Theodore Roosevelt Jr. was born on October 27, 1858, at 28 East 20th Street in Manhattan, New York City. Theodore Roosevelt Jr. was born on October 27, 1858, at 28 East 20th Street in Manhattan, New York City. He was the second of four children born to socialite Martha Stewart 'Mittie' Bulloch and businessman and philanthropist Theodore Roosevelt Sr. (brother of Robert Roosevelt and James A. Roosevelt, all sons of Cornelius Roosevelt). He had an older sister, Anna (nicknamed 'Bamie'), a younger brother, Elliott, and a younger sister, Corinne. Elliott was later the father of First Lady Anna Eleanor Roosevelt, the wife of Theodore's distant cousin, President Franklin Delano Roosevelt.