Short answers, pulled from the story.
The hieroglyphic symbol hnm appears in the name Khnum, derived from the word hnmt meaning well or spring. This linguistic root connects directly to his earliest role as guardian of Nile cataracts.
Worship of Khnum centered on two principal riverside sites: Elephantine and Esna. At Elephantine, he formed a triad with goddesses Satis and Anuket during the Eleventh Dynasty.
Khnum commonly appears seated beside a potter's wheel with a formed entity standing upon it. His primary representation features ram horns based on the extinct corkscrew-horned sheep subspecies.
The Famine Stela on Sehel island recounts seven years of drought during King Djoser's Third Dynasty reign. Middle Kingdom spell 214 of Coffin Texts credits Khnum as creator of humans themselves.
Hirohiko Araki featured Khnum in 1989 manga JoJo's Bizarre Adventure Part 3: Stardust Crusaders. Character Oingo possessed a stand named after Khnum granting ability to alter appearances.