Your third cousin is the child of your parents second cousin and share great-great grandparents as their most recent common ancestor. The parents of third cousins are related, too. Your parent and your third cousins parent are second cousins.

What relationship are third cousins?

First cousins share a grandparent (2 generations) Second cousins share a great-grandparent (3 generations) Third cousins share a great-great-grandparent (4 generations) Fourth cousins share a 3rd-great grandparent (5 generations)

What does it mean to be third cousins with someone?

It means that the closest ancestor that two people have in common is a grandparent. Second cousins means that the closest common ancestor is a great-grandparent. Third cousins, then, have a great-great-grandparent as their most recent common ancestor.

Is it OK for third cousins to marry?

Its legal in all 50 states to marry a cousin whos your second cousin or further. And as a result, marriages between third and fourth cousins produce more children and grandchildren than other couples.

How close are 3rd cousins?

Percent DNA Shared by RelationshipRelationshipAverage % DNA SharedRange2nd Cousin3.13%2.85% - 5.04%2nd Cousin once removed1.5%0.57% - 2.54%3rd Cousin0.78%0.3% - 2.0%4th Cousin0.20%0.07% - 0.5%7 more rows