Waterman

Noun

1. A seaman, a sailor.
2. A man who lives or works on the water; a boatman.
3. Someone who distributes or supplies water for a living; a water-carrier.
4. Specifically, an attendant on cab stands who supplies water to the horses.
5. A man skilled in multiple aquatic sports disciplines, such as surfing, bodysurfing, undersea diving, canoe paddling, fishing, etc.