(obsolete) A seaman, a sailor. / A man who lives or works on the water; a boatman. / Someone who distributes or supplies water for a living; a water-carrier.

A surname.

plural of waterman's knot

A loop knot made in the bight. Favoured by fishermen as quick and secure. Also known as fisherman's knot, fisherman's loop, English knot, Englishman's knot, water knot.