An Ethiopian, masculine first name that's also used in India and Pakistan, it's slang for "swift one" in Hindi, Urdu, and Punjabi. Whenever you see a fast guy, it's an Ashu. Commonly used to refer to the best track or cross country player in high school, college, etc.
Mike: "Hey, did you see Ashu run?"
Geoff: "Yeah, he cleared he mile in 6 minutes!"