adelantado
A title bestowed by the king on certain nobles in the 15th-17th centuries, who granted them governorship of a province or charged them with conquering a foreign territory
historical
The grand master[…]communicated it to the principal chiefs on the borders ; among others , to Don Pedro Henriquez , adelantado of Andalusia , Don Juan de Silva , count of Cifuentes , Don Alonso de Aguilar , and the marquis of Cadiz .
Where it comes from
Borrowed from Spanish adelantado, from Spanish adelantar (“to advance, to promote”).
Adapted from the Wiktionary entry adelantado (CC BY-SA 4.0).