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Mauricio Carlos de Onís y Mercklein

1790 – 1861

President of Congress of Deputies

Diplomat Politician
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About Mauricio Carlos de Onís y Mercklein

Lived 1790 – 1861 (aged 71). Mauricio Carlos de Onís y Mercklein was a Spanish diplomat and politician.

Mauricio Carlos de Onís y Mercklein (17 September 1790, in Dresden, Kingdom of Saxony – 24 November 1861, in Cantalapiedra, Spain) 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.

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Important facts

Born
17 September 1790, Dresden
Birth century
18th century
Died
24 November 1861, Cantalapiedra
Occupation
Diplomat, politician
Nationality
Spain
Positions held
Member of the Cortes during the reign of Isabel II, Senator of the Kingdom, Minister of State of Spain, President of the Spanish Senate
Awards
Knight of the Order of Carlos III; Order of the Red Eagle 3rd Class
Also known as
Mauricio Carlos de Onis y Mercklein

People in Mauricio Carlos de Onís y Mercklein's life

Named in this biography and alive at the same time

Portrait of Luis de Onís y González-Vara
Luis de Onís y González-Vara
1762 – 1827
Diplomat

Contemporaries

People whose lives overlapped Mauricio Carlos de Onís y Mercklein's

Portrait of Isaac Milner
Isaac Milner
1750 – 1820
Mathematician
 Portrait of Adrien-Marie Legendre
Adrien-Marie Legendre
1752 – 1833
Mathematician
 Portrait of Johann Friedrich Blumenbach
Johann Friedrich Blumenbach
1752 – 1840
Anatomist
 Portrait of Louis Nicolas Vauquelin
Louis Nicolas Vauquelin
1763 – 1829
Chemist
 Portrait of William Hyde Wollaston
William Hyde Wollaston
1766 – 1828
Chemist
 Portrait of Alexander von Humboldt
Alexander von Humboldt
1769 – 1859
Geologist

Frequently asked questions

Who was Mauricio Carlos de Onís y Mercklein?

President of Congress of Deputies

When was Mauricio Carlos de Onís y Mercklein born?

Mauricio Carlos de Onís y Mercklein was born on 17 September 1790 in Dresden.

When did Mauricio Carlos de Onís y Mercklein die?

Mauricio Carlos de Onís y Mercklein died on 24 November 1861 in Cantalapiedra.

What was Mauricio Carlos de Onís y Mercklein's occupation?

Mauricio Carlos de Onís y Mercklein was a diplomat and politician.

What nationality was Mauricio Carlos de Onís y Mercklein?

Mauricio Carlos de Onís y Mercklein was Spanish.

Sources & further reading

· Wikipedia: Mauricio Carlos de Onís y Mercklein

· Wikidata: Q6006897

· DBpedia: Mauricio Carlos de Onís y Mercklein

Cite this page

APA: Biography.guide. (2026). Mauricio Carlos de Onís y Mercklein. https://biography.guide/mauricio-carlos-de-onis-y-mercklein/

MLA: "Mauricio Carlos de Onís y Mercklein." Biography.guide, https://biography.guide/mauricio-carlos-de-onis-y-mercklein/.

Chicago: "Mauricio Carlos de Onís y Mercklein." Biography.guide. https://biography.guide/mauricio-carlos-de-onis-y-mercklein/.

Data last updated: 2026-09-23 · Spot an error? Report a correction.

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