I need some help from my mom on this one. I know that is my great-grandpa Tom McMahon on the right, with his daughter Agnes (my grandma) standing in front of him. Who are the rest? Could they be Tom’s brother Frank (left), his wife Agnes McGraw McMahon and their children? Their oldest, Richard, was the same age as my grandma. That could be him in the cap by his dad. Three girls followed him in age: Florence, Eileen, and Gertrude, but I can’t quite tell.
And then there is the lady next to Tom. Could it be his sister Kate? She may have still been in Clontarf.
Subtract about seventeen years from the gentleman standing on the left above and do you get the one standing on the left below?

I believe this one is from the 1930s. My grandma on the left with her sister Rose and Eileen McMahon, possibly one of the little ones in the first photo.
One more, just because I noticed how my grandma was holding two fingers on her right hand with her left hand and it reminded me of this cute photo.
Mom – please set me straight on dates, identifications, etc.