What’s the difference between a first cousin, a first cousin, once removed and a second cousin? I get this question a lot! I usually end up explaining it at least once during Thanksgiving dinner each year.
Cousins who share a set of grandparents because their parents are full siblings are first cousins.
Cousins who share one grandparent because their parents are half siblings are half-first-cousins.
Cousins who share a set of great-grandparents because their parents are first cousins and their grandparents are siblings are second cousins.
“Removed” comes in when the two people in questions are from different generations.