Colin was Born 1845 Urray Ross and Cromarty Scotland Now Who was Colins Father Grandfather and Greatgrandfather and Greatgreatgrandfather

I have Alexander McKenzie born 1803 died nz 1876 m Mary Gollan.
Roderick McKenzie b 1763 d1862 m Isabella McDonald.
John McKenzie m Mary McDonald. Could someone please verify that these are correct or give correct details please.
Talofa.