He married Grace Ramsey Goodyear on June 18, 1962. They have three children:
Phoebe Louisa Roosevelt (born February 25, 1965)
Nicholas Martin Roosevelt (born June 8, 1966)
Amelia "Amie" Roosevelt (born June 8, 1966), a violinist.
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/VR1P-7GR : accessed 06 May 2014), Franklin D Roosevelt in household of Franklin D Roosevelt, Ward 4, Charlottesville, Charlottesville City, Charlottesville City, Virginia, United States; citing enumeration district (ED) 104-15, sheet 2B, family 41, NARA digital publication of T627, roll 4305.
Churchill, Allen, The Roosevelts, American Aristocrats, 1965 Mosley, Charles, Burke's American Presidential Families (1993)