Michael James Syron was my paternal great-grandfather and his son, Joseph Thomas, was my paternal grandfather.
Michael's birth was listed as 1879 on his memorial, however, other records (like the ones you provided) indicate that he was born in 1877. Likewise, his mother, Ellen (Gallagher), is listed as having been born in 1863 (according to her memorial), but that conflicts with the 1871 marriage record (and the birth records for her older children), which makes records of her birth in 1855 more plausible. His father, Dominick, has been more difficult to identify, with his birth listed as somewhere between 1835 and 1846. It is my understanding that there are often similar names and surnames from that area and time period, making it even more confusing.
Michael James Syron (1879-1940) - Find a Grave Memorial
Ellen Gallagher Syron (1863-1928) - Find a Grave Memorial
Joseph T Syron (1903-1983) - Find a Grave Memorial
Thank you for your research.