Alonso Pérez de Guzmán (1256–1309), known as Guzmán el Bueno, was a Spanish nobleman and hero of Spain during the medieval period. Guzmán is the progenitor of the Dukes of Medina Sidonia, the oldest extant dukedom in the Kingdom of Castile.
- Occupation
- warrior
- Position held
- Lord of Sanlúcar, alcaide
- Citizenship
- Crown of Castile
- Born
- January 24, 1256
- Died
- September 19, 1309
