Searching for information on John (Semo) Seymour from Visnova, Austria

Searching for info on John Seymour born 1874 in Visnova, Austria. Per Census records surname changed: 1910 it was Sema, 1920 it was Suino, and 1930 it was Seymour. John died August 26,1941 in Norwalk, CT., his headstone shows the surname Semo. Per the census he came to America approx 1905. His father was Martin Semo and mother Elizabeth, unknown surname. Martin seems to have stayed in Austria, not sure. Elizabeth was buried in Norwalk, CT., October 28, 1918. Due to the various name changes I am unable to locate passenger lists,immigration documents or siblings. If anyone at all can help me based on the information I have provided, I would be extremely grateful.