I am interested to see that you have McKenzies in NZ and Australia as well. Relatives of the people that went to Massachusetts emigrated to NZ abt 1857 from Nova Scotia, aboard Breadalbane, and settled in Waipu. They were my great great grandparents, Alexander McKenzie and Ann (nee Fraser) there are hundreds of descendants.
With my Bryant connection, my great grandfather's brother, Donald Duncan McKenzie b 1811 Melvaig Gairloch Ross Shire, d Kempt Head don't know when, married a Mary MacLennan (1820-1900) - had a son Duncan Donald Duncan McKenzie (1837-1924) who married Jessie McDonald (1838-1924) in Boularderie, NS. They had a daughter Mary Ann 'Maime' McKenzie who married Guy Cauldwell bryant 16 Oct 1902, not sure where, but assume Massachusetts. They had 2 children that I am aware of Doris and Duncan Bryant. Maime's sisters - Dolina also loved in Provincetown, she married Clarence Burch; Jessie married Capt Alton S Daggett; - I think at one time the 3 sisters cooked at some kind of Boarding House or Hotel.
Hope we have a connection.