Hi Douglas. I know you asked your questions about 8 years ago. But, because we can now look up census information, I thought I would offer some for you as an FYI.
In 1920, there were well over 500 IRWIN's in NY State and about 300 of them were in NYC. Well over 100 in Manhattan and over 100 in
Brooklyn.
And, there were over 160 MacLEAN's in
MA in 1920. And, there was a Leonard
MacLEAN living in
Wakefield,
MA, that year. But he and his wife were in their 40's and no children were mentioned.
Betty (near
Lowell,
MA)
P.S. I knew an
IRWIN family in
Winchester and
Arlington,
MA, in the 1940's and 1950's. They were part of a large
IRWIN family which arrived in the US in the mid-1800's.
The 2 brothers living on adjoining farms in
Winchester had many children. I don't know anything about there children - maybe 15 in total.