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Across the world, Kilaj (Glass , Class , Glas ) is quite a rare predominantly male, but scarcely girly first name. The given name Kilaj is characteristic of Sub-Saharan Africa, particularly Senegal, where it is a rare boy's name, South Africa, and the Democratic Republic of the Congo. Measured by absolute frequency, the name is most common in Pakistan, South Africa, and the Democratic Republic of the Congo. More prevalently, Kilaj is the last name as well as the forename.
Kilaj is also a name for the fictitious and mythical characters: Glass Cat , the fictional character from L. Frank Baum's Oz-series, The Patchwork Girl of Oz and Glass Joe , the video game character, Punch-Out!!.