Name That Relationship, a game the whole family can play
During my adult lifetime I'd been told and shown what each of the less common relationship terms mean. "Third cousins" and "once removed" made sense...... for about 15 minutes and then it was gone. Embarrassing, like getting to the end of an explanation and not being able to remember how you got there. And I know I'm not alone. After doing this work full-time for three + years, I finally feel like I've got it. But, that doesn't mean you feel that way so.....
Fret no more. I've just found a site that explains it so well. I'm going to copy some of it here but give full credit to the site itself and feel free to visit it; they've got a lot more there to see: http://www.myrelative.com/html/definitions.html
Here it is:
Cousin (or "First Cousin"): The son or daughter of an uncle or aunt.
Full Cousin: The child of your aunt or uncle.
Second Cousin: People who have the same great-grandparents, but not the same grandparents.
Third, Fourth, and Fifth Cousins: Your third cousins have the same great-great-grandparents, fourth cousins have the same great-great-great-grandparents, and so on.
Removed: Distant by degrees in relationship; as, a cousin once removed; means from different generations. The words "once removed" mean that there is a difference of one generation. Twice removed means that there is a two-generation difference. etc.1C1R, 2C2R, etc: Abrieviations for the various combinations of cousin relationships. 1C1R means First Cousin Once Removed. 2C2R means Second Cousin, Twice Removed, etc.