Identifying the father in some situations can be amusing,such as "Do all your children have the same father and the answer is,"I THINK the twins do".
. My own situation started in 1907 when a young,single girl,Ida Barton gave birth to a baby boy.She couldn't afford to keep him and gave him to her brother,Bob Roller and his wife who named him Burl and he became my father after marrying my mother,Erma Taylor.
That's an example of geneology easy to trace.
Bob Roller