Gilderoy \gi-lde-roy, gil-deroy\ as a boy's name is a variant of Gilroy (Irish, Gaelic), and the meaning of Gilderoy is "son of the red-head".

The baby name Gilderoy sounds like Gildroy and Gildray. Other similar baby names are Gillroy, Galtero, Gilmer, Gilray, Gillray and Wilder.