Complex sentence: He was taken in by a family of millers who gave him the name "Juan" and raised him for ten years, after which his father recognized him, and had him educated at Alcalá and Salamanca.
Split into simpler sentences: He was taken in by a family of millers who gave him the name "Juan" and raised him for ten years. Thereafter his father recognized him, and had him educated at Alcalá and Salamanca.