Social Security Death Index indicates the following:
Paul Hentschel, b 25 Jan 1894; d. October 1968 in Traverse City, Michigan
Jadwiga, 8 Sep 1900; d. Sept 1983 in Bayville, Nassau Co., New York
I do not find the younger Paul Hentschel in the SSDI indicating he *might* still be alive. That Jadwiga died in Bayville might suggest a place of residence (at that time) of her son Paul.
It's not likely they had any additional children.