Source : Webster's Revised Unabridged Dictionary (1913)

Caddy \Cad"dy\, n.; pl. {Caddies}. [Earlier spelt catty, fr.
   Malay kat[=i] a weight of 11/3 pounds. Cf. {Catty}.]
   A small box, can, or chest to keep tea in.

Source : WordNet®

caddie
     n : an attendant who carries the golf clubs for a player [syn: {golf
         caddie}]
     v : act as a caddie and carry clubs for a player [syn: {caddy}]
     [also: {caddying}, {caddies}, {caddied}]

caddies
     See {caddie}