What is a 4th cousin?

When it comes to family trees, the term “fourth cousins” can be a confusing concept. If you’re trying to figure out who your fourth cousins are or just want to learn more about them, this blog post is here to help. To understand this relationship, let’s start by taking a closer look at fourth cousins and how they fit into the bigger picture of family trees.

In short, the answer is: A group of individuals who are related through a shared great-great-great-grandparent.

Your Relationship with Fourth Cousins

Fourth cousins are related through the great-great-grandparents of both individuals. This means that if you and your fourth cousin share the same great-great-grandparents then you are related through them. For example, if your father’s mother’s mother’s parents were also the parents of your fourth cousin’s father’s father’s father, then you two would be fourth cousins.

In addition to being related through shared great-great-grandparents, fourth cousins will also have some shared ancestors further back in their family tree. This could include third great-grandparents, sixth great-grandparents, ninth great-grandparents, etc. The further back in their family tree these ancestors go, the less likely it is that someone will actually know who these people are and what kind of relationships they had with each other.

How Many Fourth Cousins Do You Have?

The number of fourth cousins an individual has depends on how many generations there are in their family tree and how closely related they are with each other. On average, an individual will have approximately eight fourth cousins although this number can vary significantly depending on factors such as whether or not siblings marry within their own families or if marriages occur between individuals with close relationships such as first or second cousins.


Overall, understanding who your fourth cousins are can be tricky at first but it’s really not as complicated as it may seem. All it takes is a bit of research into one’s family tree to determine who is related to whom and how closely each person is connected to one another. Knowing just a little bit about one’s family history can open up an entire world of interesting stories that otherwise would remain untold for generations! So next time you find yourself wondering about your 4th cousin – remember these tips! They’ll help make finding answers a lot easier!


1. What is a fourth cousin?

A fourth cousin is a relative who is related to you through shared great-great-grandparents, or ancestors further back in your family tree. They are typically the cousins we have the least amount of contact with and may be less familiar with than other relatives such as first cousins, second cousins, or third cousins.

2. How many fourth cousins do I have?

This number will depend on the size and complexity of your family tree. On average, an individual can expect to have about 8-10 fourth cousins, though this may vary depending on how closely related other relatives in your family tree are to each other.

3. How can I find my fourth cousins?

There are a few different ways to go about finding your fourth cousins. One option is to do some research into your family tree, either by talking with relatives or digging into historical records such as birth and death certificates, marriage licenses, census data, etc. Another option is to use online tools or apps that can help you locate fourth cousins by matching the DNA data of your relatives with others who have similar genetic profiles.