Warren Delano Robbins (September 3, 1885 – April 7, 1935) was an American diplomat and first cousin of President Franklin D. Roosevelt.

From his parents marriage, he had one sibling, sister Muriel Delano Robbins (wife of Cyril Edgar Martineau of London).

[1][2][a] After his father's death in 1889, his mother remarried to Hiram Price Collier, a Unitarian minister,[5] and they lived in a mansion in Tuxedo Park, New York.

Endicott Peabody in Groton, Massachusetts (where his cousin Franklin, who was three and a half years older than him, also attended), he graduated from Harvard University in 1908.

In subsequent years, he would work in a lower-level diplomatic function, including for Charles Sherrill in Argentina in 1909, France in 1911, and Guatemala in 1914.

[10] On September 3, 1910, Robbins was married to Irene de Bruyn (1887–1960),[15] a Belgian who was born and grew up in Buenos Aires, Argentina.