Does anyone know the first and second cousin and first cousin once and twice removed??? My Dad and Aunt were brother and sister so her son and I are first cousins. That I know for certain. My question is: Is my first cousin's son, my second cousin? Is my first cousin my daughters second cousin or first cousin once removed? Is his son my daughters second cousin once removed? I just get all jumbled trying to figure this out. Also, are my second cousin's children my 3rd cousins or 2nd cousins once removed? How are they related to my daughter? 3rd cousins or 2nd once removed? Aghhhh. Thanks for helping clear this up if anyone can, Alice