Rajah Humabon

Rajah Humabon, later baptized as Don Carlos Valderrama, was a King of Cebu in the 16th century.

Humabon ruled at the time of the arrival of Portuguese-born Spanish explorer Ferdinand Magellan in the Philippines in 1521. Humabon, his wife, and his subjects were the first known Catholic converts in the Philippines. However, since there were no Catholic priests in Cebu from 1521 to 1565, this Catholicism was not practised until the return of the Spaniards to Cebu.

There is no official record of Humabon's existence before the Spanish contact. The existing information was written by Magellan's Italian voyage chronicler, Antonio Pigafetta on Humabon and the indigenous Philippine peoples that existed prior to Spanish colonization.

Rajah Humabon is cited as the reason for why Magellan fought in the Battle of Mactan, as the latter wanted to earn the trust of Humabon by helping him subdue his opponent Lapulapu, the datu of Mactan.