Emmet was born in New York City to William Jenkins Emmet and Julia Colt Pierson. He is the great-grandson of Thomas Addis Emmet, a lawyer, who was an elder brother of executed Irish nationalist Robert Emmet. His father"s parents were Robert Emmet and Rosina Hubley.
United States Military Academy.
An 1877 graduate of West Point, he served in numerous campaigns on the Western Frontier. His mother"s parents were Josiah G. Pierson and Julia Colt. He has a twin sister named Rosina Emmet Sherwood and had two other sisters, Lydia Field Emmet and Jane Emmet de Glehn.
In addition he had four brothers, Christopher Temple Emmet, a graduate of the Yale Forest School Class of 1902.
William LeRoy Emmet, a graduate of the United States Naval Academy, Class of 1881. Devereux Emmet; and Richard Stockton Emmet.
Robert Temple Emmet was married to Helena Van Courtlandt Phelps, who died on February 27, 1920 in New New York He graduated from West Point in 1877 and was commissioned Second Lieutenant, in the 9th Cavalry Regiment of the Buffalo Soldiers upon graduation.
Citation: "Lieutenant Emmet was in G Troop which was sent to relieve a detachment of soldiers under attack by hostile Apaches During a flank attack on the Indian camp, made to divert the hostiles Lieutenant Emmet and 5 of his men became surrounded when the Indians returned to defend their camp.
