Robert C. (“Calvin”) Rittner, 90, of Hamden, died May 20. He was the husband of Marilyn Rittner. Born in Brooklyn, N.Y., he was the son of Frances and Harry Rittner. In addition to his wife, he is survived by his children, Barbara Kuppersmith and her husband Bruce, Kenny Rittner, and Brian Rittner and his wife Ellen Cooper; his grandson, Daniel Cohen; his brother, Howard Rittner; and several nieces and cousins. He was also predeceased by his granddaughter, Chelsea Cohen. ROBERT E. SHURE FUNERAL HOME