I am just reading your posts. I have not met another Yetzer who was not family either. I have friended some Yetzers who are not related (at least, to my knowledge)on Facebook. I have often thought the way you do, but have no clue. All I know is the my grandfather's family are Swiss German with some English/Welsh roots. I am stumped as to how to get any more information that will lead me farther in my quest for my ancestry.
Good luck and hope to hear back from you,