Castillo, Bernal Díaz del (1908). The True History of the Conquest of New Spain. Hakluyt society. p. 295. "Pedro de Alvarado was of very perfect grace both in face and person, that he looked like the Sun.... very well made and active, and of good features and bearing; and both in appearance and in speech and in everything else he was so pleasing that he always seemed to be smiling"
Restall, Matthew; Fernandez-Armesto, Felipe (24 January 2012). The Conquistadors: A Very Short Introduction. Oxford University Press, USA. p. 45. ISBN978-0-19-539229-6. "Alvarado's blond hair, as well as his infamous temper, earned him the
Nahuatl nickname Tonatiuh (Sun, see fig. 6)"