Tammuz (Babylonian calendar)
Tammuz was a month in the Babylonian calendar, named for one of the main Babylonian gods, Tammuz (Sumerian: Dumuzid, "son of life"). Many different calendar systems have since adopted Tammuz to refer to a month in the summer season.
Source: Wikipedia — Tammuz (Babylonian calendar) (CC BY-SA 4.0)