If you ever see this.. Did your McCaffrey's arrive about 1850 or move to Michigan at that time? I have a John connected to my family whom in 1856 was on E.11th, next door to the family my GG Grandmother Anna McCaffrey ( niece or sister) newly or shortly would marry into. The surname McMahon has come up on Census Records either in same building or in next building a few times. These McCaffrey's have ties to Kinawley, Fermanagh. The given names James, Mary, Sarah, Hugh, Philip, Anna, Catherine, Elizabeth and Thomas, were found as well.