is one of the first Spanish explorers in the Americas.
He is one of the last four survivors of the Panfilo de Narváez expedition in Texas, along with Cabeza de Vaca, the enslaved Berber Estevanico, and Dorantes.
In addition, Castillo Maldonado lives with a Native American tribe in Texas between 1527 and 1528.
He most likely introduces the Christian faith to the tribe.