SlavinResearcher on Family Tree Circles

I am looking for Slavins in Australia who are connected my Great Grandfather Francis Slavin. Francis' father was Edward Slavin and mother either Maria Callaghan or Bridgett Cahill. Francis stated on his marriage certificate to Elizabeth (Betsy) England that he was born in Melbourne Vic. His age at the time of marriage in 1875 is stated as 28 years old.