The Dehnert Family of Boca Raton, Florida

I am looking for any information about the Dehnert family, I can only go back to my Grandfather, Charles Dehnert of Far Rockaway, New York, He was married to Alice Barry who I think was from Ireland.
Alice died as a young women in there marriage, and my Grandfather remarried a women named Jenny nicknamed Becky, that's all I know about my family on my fathers side.
I would like to find out who Jenny was and more about who my Grandfathers parents and sibling were.