Who Is Your Cousin?

And how? I got the following info from a 1998 posting to a DuBose Forum:

First cousins share a common Grandparent.
Second cousins share a common Great Grandparent.
Third cousins share a common Great Great Grandparent.
Fourth cousins share a common three times Great Grandparent.
Fifth cousins share a common four times Great Grandparent.
Etc., etc.

1st cousins share a common Grandparent.
1st cousins once removed are children of your 1st cousins.
1st cousins 2 times removed are children of your 1st cousins once removed.
1st cousins 3 times removed are children of your 1st cousins 2 times removed.
1st cousins 4 times removed are children of your 1st cousins 3 times removed.
Etc., etc.

2nd cousins share a common Great Grandparent.
2nd cousins once removed are children of your 2nd cousins.
2nd cousins 2 times removed are children of your 2nd cousins once removed.
2nd cousins 3 times removed are children of your 2nd cousins 2 times removed.
2nd cousins 4 times removed are children of your 2nd cousins 3 times removed.
Etc., etc.

This Cousin Tree from Wikipedia is a nice graphic version that helps a lot. If those don’t help you, this is even less likely to: Cousin Chart from the State Library of North Carolina.  

I certainly hope that one of these can settle the argument of how my husband’s brother’s grandchild is related to my husband’s daughter and her children.  

UPDATE: Here’s an even better family relationship chart.

Also, it should be noted that my husband remains unconvinced that any of this is factual and currently considers me and all other genealogists to be out of our minds.