William and Elias Kantor, NYC, 1900

I am seeking information about two brothers, William L. and Elias Kantor, who were in New York City in 1900. William was a physician, Elias, a news dealer. They immigrated from Russia.

Elias was married to "Martha." They had no children. William was married to Kate who may have been the mother of Dmitri Tiomkin. They were married in Russia and had two children, John L. and Bernard. William died in 1943 in California.

I would appreciate any information about these two men.