Background
Tomas was born somewhere in the Yucatán region, the son of John O"Horan, a native of Aughane, Ireland, and María Gertrudis de Argüello y Monte, of Campeche.
Tomas was born somewhere in the Yucatán region, the son of John O"Horan, a native of Aughane, Ireland, and María Gertrudis de Argüello y Monte, of Campeche.
John had come to the Yucatán region by way of the Canary Islands. Tomas was educated at the Seminario Conciliar of Campeche from about 1794 to 1799 and subsequently was a professor of law there. He served in the Mexican Senate representing Yucatán in 1835.
Subsequently he was also a magistrate in Mérida.
Tomas married Gertrudis Escudero de la Rocha with whom he had several children. Another son, Agustín Jorge O"Horán Escudero (1828–1884) was a medical doctor for whom the oldest hospital in Mérida is named.
He served from October 1823 to April 1825 as a member of the Second Triumvirate (ruling council) of the United Provinces of Central America, serving as Chairman every third month.