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Erasmo Seguín

1782 – 1857

Served as head postmaster of San Antonio, Texas

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About Erasmo Seguín

Lived 1782 – 1857 (aged 75). Erasmo Seguín was a Mexican and American politician and postmaster.

Juan José María Erasmo de Jesús Seguín y Fuentes (May 26, 1782 – October 30, 1857) was a prominent citizen and politician in San Antonio de Bexar (modern-day San Antonio, Texas, USA) in the 19th century. From 1807 until 1835, Seguín served as head postmaster of San Antonio, Texas. After Mexico achieved independence from Spain, Seguín was named the sole representative from Texas to the constitutional convention. He helped to draft the Constitution of 1824 and was a major influence in the addition of a general colonization provision. Seguín assisted Stephen F. Austin in choosing land for the first colony of American settlers to immigrate to Texas. He later supported the Texas Revolution, providing political as well as material support. He was the father of Tejano revolutionary Juan Seguín.

Early life and his family Juan Jose Maria Erasmo de Jesús Seguín was born on May 26, 1782, to a family of Spanish descent in San Antonio de Bexar (now San Antonio, Texas, USA). His paternal grandfather, Bartolomé Seguin, had moved to Spanish Texas from the Mexican interior soon after the founding of the town in 1718. Seguin's parents, Santiago Seguín and Maria Guadalupe Fuentes, had seven children; Erasmo was the third. Erasmo Seguin helped to create the first public school in Bexar, which his son attended. Here, Seguin raised animals and farmed cotton and corn. It would become an important source of supply for the Texan army. Seguín received additional income from his appointment as postmaster; he served in this capacity from 1807 until 1835, with two brief breaks.

Mexican Revolution During the Mexican War of Independence, Seguin likely sympathized with the rebellion. In January 1811, Juan Bautista de las Casas led a revolt in Bexar, overthrowing governor Manuel María de Salcedo and appointing himself head of a new Mexican state. His arbitrary rule caused much dissatisfaction within Texas, and Seguin helped to organize the counterrevolt that deposed de las Casas. A governing council was created to help lead the province until Spanish troops could regain control; Seguin held one of the seats.

Several years later, Arredondo offered a blanket pardon to most Tejanos. Seguin refused the pardon and instead took his case to the courts. In the summer of 1820, Seguin was elected alcade, or mayor of Bexar.

In its initial years of existence, Mexico was in much political turmoil. In late 1823, authorities called for a constitutional convention. Seguin was elected as the only delegate to represent Texas. For the next eight months, he and the other representatives worked to draft a constitution. The Constitution of 1824 was signed in October 1824. The new Mexican constitution was similar to that of the United States, with the major exception that it established Catholicism as the national religion. Against Seguin's protests, Texas was combined with Coahuila to form a new state, Coahuila y Tejas. Seguín did succeed in inserting language that allowed Texas to petition for independent statehood at a later date.

Texas Revolution Texas colonists held several meetings and conventions to discuss their grievances with Mexican governance. Most of these were considered illegal by contemporary Mexican law and lacked in attendance by native Texans. Austin tried to persuade Seguín to support the resolutions sought by the colonists. Austin went directly to San Antonio de Béxar to meet with Seguin after the Convention of 1833 adjourned on April 14. Seguin called a series of meetings, held from May 3 to 5, for prominent locals to discuss the convention proceedings. He was the only Béxar politician to fully support separate statehood.

The Texas Revolution erupted in October 1835, and General Martin Perfecto de Cos arrived in Bexar to take command of all of the Mexican troops in Texas. Unlike most other residents of Bexar, Seguin remained at his home instead of fleeing to the countryside. His loyalty was questioned by Mexican authorities because his son Juan was also a prominent supporter of the rebellion. Before the end of the year, Cos forced him to leave the city. At the same time, Seguin was stripped of his position as postmaster; he would not regain the post.

During the revolution, Seguin supplied the Texian army with beef, cattle, horses, and corn, as well as rockets for the storming of Bexar. Seguin would follow eastward with the Texians, during the Runaway Scrape. Bringing a large herd of sheep with him, he would end up eventually losing them. Seguin's ranch would also end up being raided and depleted by both the Texian and Mexican armies, who were scavenging for food. The Republic of Texas did later award him compensation for his efforts to assist the army. Things were going well, but in 1842, the tide again turned against him. He was accused of being disloyal to Texas. Casa Blanca was raided by Texan rustlers and his cattle herds stolen. His son would end up fleeing the country for his life, suggesting that Erasmo should join him. However, Erasmo held on. Most other Anglo-Texans would trust and support Erasmo Seguin and nothing would become of the charges against him.

In 1848, his son returned to the ranch, where Erasmo remained farming and ranching, until his death on October 30, 1857. Erasmo was buried next to his wife in the family plot on Casa Blanca, in Floresville, Texas.

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Important facts

Birth century
Positions held
Ambassador
Also known as
Juan Jose Maria Erasmo Seguin, Erasmo Seguin

Family & relationships

Spouse
María Josefa Becerra

People in Erasmo Seguín's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped Erasmo Seguín's

Frequently asked questions

Who was Erasmo Seguín?

served as head postmaster of San Antonio, Texas

When was Erasmo Seguín born?

Erasmo Seguín was born on 26 May 1782 in San Antonio.

When did Erasmo Seguín die?

Erasmo Seguín died on 30 October 1857 in Floresville.

What was Erasmo Seguín's occupation?

Erasmo Seguín was a politician and postmaster.

What nationality was Erasmo Seguín?

Erasmo Seguín was Mexican and American.

Sources & further reading

· Wikipedia: Erasmo Seguín

· Wikidata: Q5384934

· DBpedia: Erasmo Seguín

Cite this page

APA: Biography.guide. (2026). Erasmo Seguín. https://biography.guide/erasmo-seguin/

MLA: "Erasmo Seguín." Biography.guide, https://biography.guide/erasmo-seguin/.

Chicago: "Erasmo Seguín." Biography.guide. https://biography.guide/erasmo-seguin/.

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