Definition from Wiktionary, the free dictionary
From Old Irish gilla; compare English child, Anglo-Saxon cild. Zimmer thinks it is borrowed from the Old Norse gildr (“stout, brawny, of full worth”), English guild, Anglo-Saxon gild (“payment”) (see geall), gilda (“fellow”).
- (dated) servant, follower
- boy, lad, youth (male aged from the toddler years to about the middle twenties)
- man, boy (as a familiar address for a male of any age)