No, not all of the Stoudemire's are related. Some came off of different plantations. However, my Stoudemire side is the largest (I believe). We are related to so many people that it is unbelievable. Who is Eddie's father? I would need to know the great and great-great-grandparents in order to determine if your boyfriend is from the same Stoudemire line. What other Stoudemire's do he know that he is related to? Maybe that would help some.