Gregorio de Montalvo Olivera
Spanish religious
Gregorio de Montalvo Oliver (1529 – 11 December, 1592) was a Roman Catholic prelate who served as Bishop of Cuzco (1587-1592) and Bishop of Yucatán (1580-1581).
He was born in Coca, Segovia, Spain, and ordained a priest in the Order of Preachers. On 15 December 1580, he was appointed during the papacy of Pope Gregory XIII as Bishop of Yucatán. In 1581, he was consecrated bishop. On 16 November 1587, he was appointed during the papacy of Pope Sixtus V as Bishop of Cuzco. He served as Bishop of Cuzco until his death, on 11 December 1592.