On October 14, 1914, Warner married Irma Claire Salomon, the daughter of Sam Salomon and Bertha Franklin Salomon from one of San Francisco's pioneer Jewish families. Irma Warner gave birth to the couple's only child, Jack M. Warner, on March 27, 1916. Jack Warner named the child after himself, disregarding an Eastern European Jewish custom that children should not be named after living relatives. Although his son bore a different middle initial, he "has been called Junior all his life". The marriage ended in 1935, when Warner left his wife for another woman, Ann Page. Warner and Ann had a daughter named Barbara. Irma Warner sued her husband for divorce on the grounds of desertion. Jack's older brother, Harry, reflected the Warner family feelings about the marriage when he exclaimed, "Thank God our mother didn't live to see this". Warner married Ann after the divorce. The Warners, who took Irma's side in the affair, refused to accept Ann as a family member. In the wake of this falling out, Jack's relationship with his son, Jack Warner Jr., also became strained.