Genealogical Terms

Want to know the definition of a fifth cousin? Learn all about how fifth cousins are related, the common ancestors they share, and how many you might have.

Do you want to know what a first cousin is? In this post, find the definition of first cousin and exactly how a first cousin is related to you.

Want to know how to understand pedigree collapse? Here, find the definition, see examples, and learn how to find it in our family trees.

What is a second cousin? Our second cousins are actually closely related to us, even if we don’t know all of them. Here, learn all about second cousins!

What is a third cousin? Want to see an example of third cousins? How many third cousins do you have? Find these answers and more in this post!

If you are doing family tree research, you might stumble upon some unfamiliar terms.  Cousins removed – what in the world?  In this post, you will learn what a third cousin once-removed is, how many third cousins once-removed you might have, along with the best way to locate your third cousins. What is the definition …

What is a half-cousin? A half-first cousin? You’ve come to the right place to find all types of half-cousins explained, as well as a half-cousin chart.

What is a double-fourth cousin, and how are they related? Do double-fourth cousins share more DNA with each other than they would otherwise? In this post, I’ll explain the meaning of a double-fourth cousin, show you an example of my own double-fourth cousin, and talk about how this “double” relationship affects the amount of DNA …

In this post, you will learn what is a 3/4 sibling, how much DNA 3/4 siblings typically share, and how to know if you have a three quarter sibling.

MRCA is of the most common notations used in genealogy. In this post, learn what these letters stand for in the definition of MRCA. If you’ve been doing this whole family tree research thing for a while, you might have seen the letters “MRCA”.  It’s especially common to see this in the genetic genealogy sphere …