What cousin is this person to me (2nd 3rd 4th?)?

Question:

What cousin is this person to me (2nd 3rd 4th?)?

I met a girl at my church, and her great-grandfather was my great-grandfather's brother. What does that make us? Thanks!

Best Answer - Chosen by Asker: Shirley is right, you are third cousins. An easy way to remember is like this:

If your common ancestors are a set of grandparents then you are first cousins
If your common ancestors are a set of great grandparents then you are second cousins
If your common ancestors are a set of great great grandparents then you are third cousins as in your case.

I hope this helps. Blessings.