Lionel Corporation
Born to a Jewish family in the Bronx, New York City, Cohn was the only child of Dora (née Marcus; 1892–1967) and Judge Albert C. Cohn (1885–1959); his father was influential in Democratic Party politics. His great-uncle was Joshua Lionel Cowen, the founder and longtime owner of the Lionel Corporation, a manufacturer of toy trains. Cohn lived in his parents' home until his mother's death, after which he lived in New York, the District of Columbia, and Greenwich, Connecticut.