Alonso del Castillo Maldonado (?-?) was a Spanish explorer. The son of impoverished nobility, Castillo decided to make his fortune in New Spain. He joined the Pánfilo de Narváez expedition to Florida in 1527. The expedition was a disaster, and only four members, Castillo, Andrés Dorantes de Carranza, Dorantes' slave, Estevánico, and Álvar Núñez Cabeza de Vaca walked across the deserts of modern Mexico, New Mexico, and Texas, before finally reaching civilization in 1536. Castillo was a deeply pious man, and is credited with introducting faith-healing to the Native American groups the survivors encountered.