Your name peaked my interest because I have Haimowitz who married Cohn in my family - all from Isai. There were 2 sisters, Gizella and Rosika and a brother named Isadore who
later changed his name to Eugene Haimes. Gizella married Harry Cohn and her children were Arthur, George, Pauline, Jenny and Martin. Rosika married a Cohn but I do not know who or anything about her except that I have a picture of her in 1933 when she traveled back to Europe with my cousin's grandmother and Eugene.
Looking for Cohn/Cohen is virtually impossible. I am wondering if you are descended from Rosie/Rosika?