I thought this was a picture of Nana carrying Baby Mommy, but closer inspection shows:
1) The baby looks exactly like my father
2) They are in front of the Breukelen (57 Montague St., near the ACPT Brooklyn Bridge Marriott), where I lived as a baby.
So the baby is me.
Here I am 56 years later (2008) in the same location, facing the other direction: