José María Barreiro Manjón

José María Barreiro Manjón (August 20, 1793 – October 11, 1819) was a Spanish military officer who fought in the Peninsular War and in the Colombian War of Independence. In 1819 at the rank of colonel, he was commander of the III Division of Expeditionary Army of Costa Firme (Royalist Army) in New Granada during Simon Bolivar's campaign to liberate New Granada. He commanded his army against the Patriot Army at the Battle of Vargas Swamp, where he would be defeated, and at the Battle of Boyacá, where he would be captured along with remnants of the III Division and the end of Spanish control over New Granada.

Barreiro would die at the age of 26, when he and 37 other Spanish officers who had been taken prisoner were executed by firing squad in the main plaza of Santa Fe by orders of General Francisco de Paula Santander on October 11, 1819.