Kaius is a unique-sounding name that is beautiful to hear and even say aloud. This name is of Latin origin, where the meaning of Kaius is 'rejoice' or 'joyful'. Kaius is a variation of the Latin name Gaius. It is also the phonetic variation of the Latin name Caius. Caius was an ancient and famous poet who got his introduction from the style maestro Rachel Zoe. This name is a constant reminder and an assurance about how lucky you are to be blessed with an angelic child. Your child is a reason for you to be happy and rejoice every day of life; hence, this is an apt name to celebrate your baby's existence! Kaius is a name that only radiates joy, celebration, and positivity.