the last name look like different but similar to common surnames in souther Italy: in the first document ( http://i269.photobucket.com/albums/jj65 ... a.jpgmaybe) is Daccardi (actually you can find D'accardi too) in the second document it seems Accardi , without "D". It is a common mistake. My Great grand mother's surname was DAVOLA but i found Avola or D'Avola and so one ....
Have a nice day
I'm searching lost relatives and descendant of my greatgrandfather Vincenzo Genualdi (or Gennaldi or Genuardi) and my greatgrandmother Concetta Davola (their sons: Angela, Carmela, Antonio, Bartolomeo, Ernesto, Simone, Riccardo, Maria) went in Chicago,Ill., and New Orleans, in 1880-1920 from Sicily. Other family related : Jacobucci or Jacopucci (from Central Italy).
have you considered that Michelangelo might have married twice and that both wives' first name was Domenica? The two family names look quite different even assuming that officers were sometimes mispelling names.
Also, you said that Michelangelo died before both death records were written. This is wrong. On the first record Michelangelo is alive, on the second one you can see the word "fu" before his name which means "the late".