Wellington Timothy Mara was an American co-owner of the New York Giants of the National Football League (NFL) from 1959 until his death. He was the younger son of Tim Mara, who founded the Giants in 1925. Wellington was a ball boy that year.

Timothy James Mara was the American founding owner of the New York Giants of the National Football League (NFL). The Giants, under Mara, won NFL championships in 1927, 1934, 1938, and 1956 and divisional titles in 1933, 1935, 1939, 1941, 1944, 1946, and 1958.