Codex Borbonicus, p. 9, a Mexica calendar book painted around the time of the Spanish conquest.
Key myth
Giver of rain and also of hail and drowning. Children were offered at his festivals in Atlcahualo; his twin shrine with Huitzilopochtli topped the Templo Mayor.
Where sources differ or caution applies. Chalchiuhtlicue is sometimes his sister, sometimes his wife.
Deities in other traditions who share a theme with Tlaloc: sky, storm and thunder, earth, harvest and fertility, sea and waters. This is overlap in one area only.