If we share great grandparents but have different grandparents we are second cousins
If you are interested:
Cousin - Wikipedia, the free encyclopedia
A cousin is the son/daughter of aunt or uncle.
But what does it mean when someone say "x is my second cousin"?
The child of your [first] cousin is your second cousin.
a maternal uncle is "the brother of one’s mother".
What do you call the brother of one’s father?
It's OK, I looked it up: