Luis de Onís

Luis de Onís y González-Vara
Minister of Spain to the United States
In office
7 October 1809 – 10 May 1819
Preceded byValentin de Foronda
Succeeded byFrancisco Dionisio Vives
Personal details
Born(1762-06-04)4 June 1762
Died17 May 1827(1827-05-17) (aged 64)
Madrid, Spain
SpouseFederika Christina von Mercklein
ProfessionDiplomat and ambassador of Spain
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Luis de Onís y González-Vara (4 June 1762 – 17 May 1827) was a Spanish career diplomat who served as Spain's envoy to the United States from 1809 to 1819, and co-negotiated the Adams–Onís Treaty (signed 1819; ratified 1821) with United States Secretary of State John Quincy Adams, by which Spain ceded Florida to the United States, the United States renounced its claims to Texas, and a transcontinental boundary was defined to the Pacific Ocean.