Kayjuan is an uncommon first name of uncertain origin but believed to derive from Middle English names like Kaye or Key combined with the Spanish variant of John, "Juan," meaning "God is gracious." This fusion results in a distinctive and rare name with spelling variations such as Kaiyan, Kiyuan, and Kajuan. As it's not culturally tied to any specific region or language, Kayjuan can be considered a global name with a unique blend of influences.