Guillermo Sevilla Sacasa

In this Spanish name, the first or paternal surname is Sevilla and the second or maternal family name is Sacasa.

Guillermo Sevilla Sacasa
Sevilla Sacasa in 1967
Ambassador of Nicaragua to the United States
In office 1943 (1943) – July 19, 1979 (1979-07-19)
Personal details
Born	(1908-09-11)September 11, 1908 Leon, Nicaragua
Died	December 16, 1997(1997-12-16) (aged 89) Potomac, Maryland, United States
Spouse	Lillian Somoza Debayle
Occupation	Judge, president of the lower chamber of National Congress of Nicaragua

The Embassy of Nicaragua in Washington, D.C., at 1627 New Hampshire Ave NW, where Sevilla-Sacasa had his Chanchery while serving as Nicaraguan Ambassador to the United States.

Guillermo Sevilla Sacasa (September 11, 1908, Leon, Nicaragua – December 16, 1997 Potomac, Maryland, United States) was the Nicaraguan ambassador to the United States from 1943 until July 19, 1979, when President Anastasio Somoza Debayle was forced into exile following the Nicaraguan Revolution. As a result of his record-breaking service as ambassador in Washington, D.C., he was appointed Dean of the Diplomatic Corps, a position he held from January 1958 to July 1979.

He was the son of J. Ramón Sevilla Castellón and wife Dolores Sacasa Sacasa, first-cousin of Juan Bautista Sacasa Sacasa and Benjamin Lacayo Sacasa, 63rd and 69th presidents of Nicaragua respectively. Dolores was the daughter of Antioco Sacasa Sarria, brother of Roberto Sacasa Sarria, 44th and 46th President of Nicaragua. Also, her great-uncle was Vicente Cuadra Lugo, 38th President of Nicaragua.

Known as the "world's most decorated ambassador", he was a judge and president of the lower chamber of National Congress of Nicaragua. He also served as Ambassador to the U.S. for 36 years under eight American Presidents and eleven Secretaries of State, a singularly unique and unprecedented achievement, unmatched to this day.

In 1943, Sevilla-Sacasa married Lillian Somoza Debayle, born in León, Nicaragua, on May 3, 1921, the daughter of Anastasio Somoza García, the 65th and 69th President of Nicaragua, and Salvadora Debayle Sacasa, and had nine children.