trying to find family
My father, Leonard,who passed away, was born to Samuel(39) and Ray(38)(Levenson)Rosenthal in NYC. in 1911.We are looking for relatives.Only thing we have is my fathers birth certif.Address on it for Samuel and Ray was 115 E 103 ST.,NYC.,and they were from Russia, his occupation was clothing and 7 other children.We know Leonard had a sister, Syd, who married a Ben Korman and they had a son, Thomas(Tommy)and lived on Long Island,NY My father changed his name in early 20's to Rosendahl.We don't know why but know there are relatives out there somewhere and we would like to know our ancestry.We know this will be difficult since we think my father was youngest of 8 children, however, he must have nephews or neices still living. i.e. Tommy Korman. Please help if you can. Thanks!