Juan Rodríguez Cabrillo (1499-1543)
Mar 13 Portuguese-Spanish conquistador who conquered Central America and later discovered California [birthdate is approximate], born in either Montalegre, Kingdom of Portugal or Palma del Río, Kingdom of Castile
- Mar 31 Pius IV [Gianangelo de' Medici], Italian lawyer and Pope (1559-65), born in Milan (d. 1565)