For those who don’t understand how cousins are counted…it’s easy. My uncle has three sons: the oldest one was my first cousin, the middle one was my second cousin, and the youngest one was my third cousin.
Of course that’s not how first, second, and third cousins are determined. First cousins share a set of grandparents. Second cousins share a set of great-grandparents, and third cousins share a set of great-great-grandparents. The pattern continues on successively. There are charts that attempt to show the relationship graphically for those who are visual learners.
Then there are the removed when the two individuals are not the same generation of descent from the common ancestor. Your first cousin’s child and you are first cousins once removed–because that child is one more generation removed from the original ancestor than you are. Your cousin’s grandchild and you would be first cousins twice removed–because that grandchild is two generations further from the original ancestor than you.
Your child and your first cousin’s child would be second cousins. Your child and your first cousins child share a set of great-grandparents–the people who are you and your cousins’s grandparents.
And of course, there several nuances:
- half cousins–would only share one grandparent or one great-grandparent. This could easily happen if a person had multiple spouses
- double cousins–people who are related in more than one way. This most often happens when brothers marry sisters, a brother and sister marry a sister and a brother, etc.
Instead of stating the specific relationship between two individuals, I prefer to clearly state the common ancestor.
Edward and Curtis Habben were both grandsons of John M. and Anke H. (Fecht) Habben.
Cecil Neill and Edna (Rampley) Dion were second cousins, being great-grandchildren of James and Elizabeth (Chaney) Rampley. Their son Riley was Cecil’s grandfather and their son James was Edna’s grandfather.
Your mileage may vary.