Hi! I do not know a lot about the mackay side of my family- but I would like to!! This is information that i know:
My grandmother (fathers side) was Noeline Mackay she had a brother called Doug Noeline had4 children: Ramon (my father) Suzette Deirdre Geoffrey
As far as I can tell my dads father is a man called kenneth brooks Noeline married a man called Ron Duff who died in the 1960s I believe Noelines mother was Florence Mackay (Flossie)- her father was always known as "pop"
They lived in Dunedin, Southland and had connections with Bluff and Hamilton.