Gillbey \gi-ll-bey\ as a boy's name is a variant of Gilby (Old Norse, Irish, Gaelic), and the meaning of Gillbey is "estate of the hostage; blond boy".

The baby name Gillbey sounds like Gillby and Gilbey. Other similar baby names are Gilley, Gillbie, Gilles, Gillen, Gillies, Gillray, Gillroy and Wellbey.