How do I differentiate between a second cousin and 1st cousin, once removed?
An easy way to remember cousinship is If you are 1st cousins, you share a set of grandparents If you are 2nd cousins, you share a set of great grandparents if you are 3rd cousins, you share a set of great great grandparents etc. So, by definition, your second cousin and you would have a set of great grandparents in common. In the case of a 1st cousins once removed, the generations are uneven. For example, if your first cousin has a child, that child would be your first cousin once removed. If you also had a child, your child would be second cousins with your cousins baby. I hope this helps.