I wonder if you are referring to my cousin, "Nathan" Carnovitz (that is one spelling of the surname and it was changed to Greenspan by a Zionist sponsor before Nathan's immigration to Palestine and then St. Louis, MO in 1923.). He was a son of Sarah Broida who was Jacob's eldest daughter. I am Jacob's great grandson. I knew Nathan quite well as he worked as a partner with my grandfather, Max Broida. It also seems that Broida was actually Karklinsky before it was changed to Broida (after immigration) but I am still researching that strange connection.