Children Can’t be Born Before Their Parents: A common-sense guide for genealogical beginners

Children Can’t be Born Before Their Parents: A common-sense guide for genealogical beginners

This is a guest post by Jennifer Mendelsohn. A freelance journalist for more than 20 years, Jennifer Mendelsohn’s work has appeared in The New York Times, The Washington Post, Slate, USA Today, People, Tablet and many others. She is an avid genealogist and a member of the board of the Jewish Genealogy Society of Maryland.

To say that the availability of online records has revolutionized genealogy would be an understatement. It wasn’t that long ago that it could take months or even years to pull together the kind of information you can now find over a leisurely afternoon spent browsing online, sipping coffee at your desk. Census records, birth certificates, photographs, naturalizations — so much is available, sometimes literally at the click of a key.

But that easy access is not without its downside. For new genealogists, going online for the first time can be like visiting a sumptuous buffet table, brimming with tantalizing delicacies. The good news is that there’s so. much. good. stuff. The bad news is that it’s easy to overfill your plate and end up feeling sick. It’s almost — dare I say it? — as if online access has made it too easy. When there wasn’t that much information readily available — when you had to actually go to an archive or library to find things — there were fewer opportunities to fill your tree with bad information. These days, there is so much available that it’s extraordinarily tempting to vacuum up every record and Smart Match offered online and attach it to your tree. Poof! You’ve taken your tree all the way back to Adam and Eve!

If only it were that easy.

A big tree with thousands of people may seem impressive on the surface, but when the tree is filled with unreliable information, and with people who are not actually related to you, it really doesn’t matter how big it is.

So how can you fill your tree with good information?

Professional genealogists actually have clear standards for how they conduct research. The professional bible known as Genealogy Standards, published by the Board for Certification of Genealogists, lays out a five-point protocol known as the Genealogical Proof Standard. And, while it might be unrealistic to expect that every casual user working on an online family tree can be held to that professional standard, especially when they’re just getting started, it’s worth looking at what the Genealogical Proof Standard entails and how beginners can learn from it.

1. Conduct a reasonably exhaustive search:

This means you must exhaust – within reason – all possibilities to find the information you’re looking for, which also means familiarizing yourself with what records are available and where to find them. For the MyHeritage beginner, it’s important to understand that while MyHeritage has literally billions and billions of records, and you are almost certain to find some of what you’re looking for, not every document you need will be online.

People often mistakenly assume that everything they need is going to pop up when they hit “search all records,” which leads them to make mistakes: If a search returns a record that seems like it could be the one they want, they assume it must be because they’re not aware that the correct one is simply not indexed or available online.

If you’re searching for a birth certificate for your great-grandfather John Williams, who you think may have been born in New York City in 1907, you can’t simply accept that the first birth certificate you see with that name and year is the correct one. Because there might have been three – or 13! or 30! – John Williams born in New York City that year. What specific information – Parents’ names? Parents’ place of birth? Address? Birthdate? – matches previously confirmed information about your John Williams and suggests that a specific record should be added to your tree?

2. Use complete and accurate source citations:

Ellis Island and other New York Passenger Lists, 1820–1957 – Albert Einstein, MyHeritage SuperSearch™.

Ellis Island and other New York Passenger Lists, 1820–1957 – Albert Einstein, MyHeritage SuperSearch™.

Simply, you should indicate where your information came from, and use credible sources. Anyone looking at your tree should be able to replicate your search, and find the same information from the same source that you did.

For beginners, it’s crucial to remember that other users’ trees do not necessarily count as credible sources. Newbies tend to get a little over-eager about confirming Smart Matches to other people’s trees. Perhaps that person has already done the heavy lifting of sketching out some distant branches of your family. By confirming, all those new people will be automatically grafted into your tree, which can be gratifying. But doing so sometimes means you are unwittingly importing and embedding many errors in the process.

Remember that trees are only as good as their creators. Some are worth copying and some are definitely not. Evaluate how good the information in the other user’s tree is – Is it well-sourced? Is it logical? Does the creator have a legitimate connection to the family in question?- before grafting it onto your own.

3. Perform a thorough analysis and prove correlation:

Here’s where you look at the information you’ve found and interpret it. How good are the sources you have? How reliable is the information they contain? How was that information obtained and from whom? What next steps for research or conclusions has it led you to?

If you’re using information from a death certificate, for instance, think about who completed it. A spouse may be a more reliable source for the name of her late partner’s parents – whom she may have actually known – than a child born after they died. A death certificate completed by the undertaker is less reliable than one filled out by a family member. And the information on a death certificate, often filled out under duress by grief-stricken family members, is generally less likely to be reliable than the information on a birth certificate.

4. Resolve conflicting information:

A tough one, but we all encounter information that doesn’t jive: In one census, your great-great-grandfather was said to have been born in Switzerland in 1835; in the next, he says he was born in New York City in 1838. You have to think through the steps you’ve taken to decide which one is more correct than the other – maybe it’s a preponderance of evidence suggesting he was Swiss, including, for example, a naturalization document showing an address you have confirmed was his. You can’t make a credible conclusion if you haven’t resolved these conflicts.

5. Include a soundly reasoned and coherently written conclusion:

What’s the upshot of all you’ve found? How did you get from all the pieces of evidence to the conclusions you have made? Professional genealogists tie it all together. Taking the step of documenting your reasoning eliminates the chance that you’re simply rubber-stamping a preconceived notion, or that you haven’t fully considered all of the evidence.

Does the GPS seem daunting? Are your eyes glazing over? That’s OK.

Even if you’re not a professional genealogist and have no plans to become one, one simple thing you can do while working on your tree is to use what might be called the Common Sense Standard: When analyzing records, be especially skeptical about adding seemingly inplausible information to your tree. Families, for the most part, typically follow common sense arcs . So should your tree. Sure, sometimes families have extraordinary circumstances, but that’s the exception, not the rule.

There’s a principle used in science called Occam’s Razor that says the most likely explanation for something is the simplest and least complicated. I like to practice something I call “Occam’s Razor Genealogy:” When evaluating genealogical options, you need to remember that often the least convoluted answer is the correct one. That means you should pay attention to basic chronology and geography, which really shouldn’t be difficult.

I can’t believe I have to say this, but having looked at many trees over the years, here goes: Children can’t be born before their parents. And you can’t emigrate to a new country before you’re born or serve in the military after you die. I know, I know, it’s crazy, right? But before you add Mary Farnsworth (born 1788) and Josiah William Elliott (born 1785) as the parents of Josiah William Elliott Jr. (born 1777), stop and take a moment. It’s just not possible.

Similarly, remember the limitations of human biology. A man can’t father a child when he’s 10 years old. A mother can’t be 90 when she gives birth, Bible stories notwithstanding. Full siblings can’t be four months apart. Sure, people move around, but they don’t typically have children born on three different continents in three years. If Jacob and Ida Rosenstein had children born in Zhitomir, Ukraine in 1891, 1893 and 1897 and 1899, you should be skeptical of the idea that their son Hyman was born in 1896 in Argentina, and you definitely should not include that fact in your tree unless you have ironclad evidence. And, if a preponderance of evidence suggests someone’s year of birth is 1910 or 1911, it’s highly unlikely that a death certificate for someone born in 1927 is the same person, so think long and hard before you attach it to your tree. Sounds silly, right? But you’d be amazed how many times I have seen trees with exactly these kinds of glaring errors.

The great news for beginners is that MyHeritage has a built-in feature called the Consistency Checker that can eliminate many common sense errors almost effortlessly. Access the Consistency Checker from the drop-down menu under “Family Tree” on the MyHeritage home page. It will automatically flag exactly these kinds of errors – wives who are 70 years younger than their husbands, people living to 130, or parents born after children – and can sometimes fix them with as little as one click.

MyHeritage Online Tree Consistency Checker (Click to zoom)

MyHeritage Online Tree Consistency Checker (Click to zoom)

So the next time you sit down to work on your tree, try to change your mindset. Instead of being an information vacuum, sucking up every record in your path with abandon, think of yourself as an information gatekeeper: Be skeptical, and don’t let any information through that gate and into your tree until you’ve done your best to confirm that it deserves to be let in.


The email address is kept private and will not be shown

  • Patrick McVicker

    January 10, 2018

    Children can be born before their parents if they were adopted, or step children.

  • Michael West

    January 11, 2018

    Re: common sense timelines

    It is also considered bad manners to bury somebody 9 or 10 years before they’re dead. …and somewhat miraculous to christen a baby 3 or 4 years before they’re born.

  • Sylvia Jeanes

    January 11, 2018

    I was extremely pleased to read this and do hope that maybe a lot of of family researchers will take this information seriously. In my own case I have found a lot of misinformation that has been added to family trees. In one instance, two completetly different families not related to each other at all have been joined together to form one family.

  • Rosrmary Henwood

    January 11, 2018

    Very interesting and informative. Back to square one and check tree again.

  • Virginia Dobias

    January 12, 2018

    I actually saw a couple if these errors recently. I sent a message to the tree owner & put the dates down so he could do the math. Also I have seen 10 year old females having children by a 15 year old male, they got married and had quite a few more children. I was skeptical at first but I believe the numbers actually happened the way they were presented. I had another researcher tell me of an aunt who was 12 when she had her first child and got married. I think I need to change my approach now so I don’t end up with such errors. I also see duplicates in many trees and I have to admit I don’t take much stock in their data. If they haven’t found out how to delete duplicates it tells me they are just being a vacuum of data and not taking the time to see if the dates & names make any sense.

  • Peggy

    January 13, 2018

    I’m trying to find my mat GM father’s relatives in south LA. My mat gt. GM was never married to her father and believed he had a family. My GM had no birth certificate, born (estimated) around 1910 in Louisiana; no documented birth certificates. The father was reported to be white.Any search suggestions.

  • Peter A. Burns

    January 13, 2018

    I fully agree. Particularly with American Family Tree makers, who appear to be trying to prove they have aristocratic British ancestors. They often show exactly the errors you describe, including marrying two three & even 4 times and that tree is then copied by hundreds of other tree makers making many of the billions of useless records.

  • Lynne

    January 14, 2018

    Excellent article on Common Sense. I shall keep in my ‘Basics’ folder as a reminder. It applies where ever you are researching and particularly useful for a confusing situation.

  • Philip

    January 14, 2018

    Thank you, a most excellent article! Very helpful!

  • Jean Main

    January 14, 2018

    Jenifer’s article should be handed to every person who is thinking of indulging in family history for the errors she describes all too frequently appear in family trees..

  • Peter Olney

    January 15, 2018

    Board for Certification of Genealogists. Excellent summary, but where can I get a copy of this book here in New Zealand?

  • Maurice B Mittelmark

    May 3, 2018

    Thanks, Jennifer, a lot of common sense, very nicely summarised and presented, for those of use who still have a degree of common sense to develop!

  • E


    March 27, 2022

    A great summary, thanks Jennifer