Spanish politician and diplomat Mauricio Carlos de Onís

Mauricio Carlos de Onís y Mercklein (Dresden, Kingdom of Saxony, 17 September 1790 – Cantalapiedra, Spain, 24 November 1861) was a Spanish politician and diplomat who served as Minister of State in 1840 and as President of the Congress of Deputies.

Mauricio was son of Luis de Onís y González-Vara, an important diplomat who signed the Adams-Onís Treaty with the United States in 1819, and of Federika Christina von Mercklein. He married in Cantalapiedra, 11 December 1816, his first cousin Carolina de Onís, and had issue.

References

• Mauricio Carlos de Onís. Spanish Senate
• Cadenas y Vinent, Vicente de (1986). Extracto de los Expedientes de la Orden de Carlos III (1771-1847). Vol.:9. ISBN:9788400061531. Retrieved 2010-03-17.