archie Mac Nair, Albert Mac Nair
In the 1930 US census of Franklin County NY (Upstate NY) in the town of Fort Covington, NY I found 2 Mac Nair's.
HOUSEHOLD ONE
Archie H. Mac Nair - Age 76 - born in Canada - both parents born in Canada - immigrated to the US in 1890 - he was a feed merchant at a retail feed store
Christiana Warden (Archie's sister) - age 50 - born in Canada - both parents born in Canada - immigrated to the US in 1904 - unemployed
HOUSEHOLD TWO
Albert Mac Nair - age 42 - born Canada - father born Canada - mother born NY - immigrated to the US in 1890 - A Teamster doing odd jobs.
Francis M. (wife) - age 36 - born NY - father and mother born NY - unemployed
Marjorie G. (daughter) - age 10
Elsie M. (daughter) - age 8
because Archie and Albert immigrated to the US at the same time, I believe Albert is Archie's son.. in the census it is stated that Archie is a widow.. his wife (Albert's mom) must have died.