Hi. My family (Britwitz) owned a store in Ybor City, Fl, and were friends of Isidore Kaunitz and his family. My great-uncle, Lou Britwitz, remained friends w/Isidore's son (?) for his life--that Kaunitz was a dr. in the same bldg my great-uncle lived in on the Upper east Side of Manhattan.
There are many articles on google about Ybor City and it's immigrant history...one recent one in "Cigar City News" which is a publication of the historical society of Ybor, has a photo of the Kaunitz store. It was called "El Sombrero Blanco" because Old Man Kaunitz always wore a white hat--probably to distinguish himself from the many other dry-goods stores in the town. (Many Romanians settled in the town at the turn of the century).