Manuel Luís Osório, Marquis of Erval (May 10, 1808 – October 4, 1879) was a Brazilian military officer, monarchist and politician. A member of the Imperial Army at the age of fifteen, he climbed all the posts of the military hierarchy of his time thanks to the soldier attributes that consecrated him as "The Legendary". He participated in the main military events of the late nineteenth century in the Río de la Plata region and is considered a hero of the Paraguayan War. He was declared patron of the Cavalry Branch of the Brazilian Army in 1962.
