OMG does it ever!
I'm not certain that I know your Dora, although there is a known Shuman connection to this Jake Dain. My Jake Dain did live in NYC, was Jewish & must be the same person.
Jake's first wife had 5 sisers & 2 half siblings. His sister-in-law Rebecca had two daughters, one of whom was my grandmother Harriet & the other was my great-aunt Edna.
Edna married David Musicant, they lived in Teaneck, NJ & owned both a florist shop as well as a funeral home. The funeral home is actually still in business and in family hands to this day.
I have never acually bumped into anyone who had an actual connection to anyone I've ever posted about. I cannot tell you how thrilled I was when I saw your post. Please email me at firstname.lastname@example.org
I would love to share further information with you.