Hillyer \hi-ll-yer\ as a boy's name is a variant of Hillard (Old German) and Hilliard (Old German, Old English), and the meaning of Hillyer is "hard warrior; battle guard; yard on a hill".

The baby name Hillyer sounds like Hillier and Hiller. Other similar baby names are Hillyerd, Collyer, Heller, Hillery and Hillyard.