Hey everyone, from my research I have found out that I too am related to Stephen Boyd through his mother, and this is the following info I have found.
Stephen Boyd's mother Martha was one of 10 siblings: Jane, Mary, William, Annie, Agnes(my gg grandmother), John, Rachel, Archie, David and Martha.
Their parents were called John and Mary Boyd, both born in 1851
Martha(stephens mother) married James Alexander Millar and had 6 children: James, Harry, Alex, Rita, William(a.k.a. stephen) and Jack.
Hope this helps, I have more indepth info if anyone needs it