[3] His maternal grandparents were Theodore "Thee" Roosevelt Sr., a businessman/philanthropist, and Martha Stewart "Mittie" Bulloch, a socialite.

[4] In 1912, Robinson was elected chairman of his uncle Theodore's Progressive "Bull Moose" Party in the State of New York, and served until 1914.

[4] In 1921, along with Assemblyman Joseph Steinberg, he led an investigation into John Francis Hylan, the then Mayor of New York City.

[4] In 1924, he was appointed Assistant Secretary of the Navy by Calvin Coolidge, taking the reins from his cousin, Theodore Roosevelt III.

[11] Together they had: Robinson lived in Herkimer County, New York, where his family had an estate since 1725 called "Henderson House".

[4] His funeral was at the family estate,[22] His pallbearers were Edmund B. Rogers, Franklin B. Lord, G. Palen Snow, Elbridge G. Chadwick, Wendell Blagden, Warren Motley, John Cutter, and James Hackson.