Quentin Roosevelt II (November 4, 1919 – December 21, 1948) was the fourth child and youngest son of Theodore "Ted" Roosevelt III and Eleanor Butler Alexander.
He was the namesake of his uncle Quentin Roosevelt, who was killed in action in 1918 during World War I.
His elder brothers were World War II veterans Theodore Roosevelt IV and Cornelius Van Schaack Roosevelt III.
He was a grandson of President Theodore Roosevelt.