Jayjay

Double joy or a diminutive of names starting with J

Jayjay is primarily used as a playful, repetitive nickname for names beginning with the letter J, such as James, Jason, or Jay. It can also be interpreted as a doubling of the name Jay, which refers to the colorful bird or signifies 'rejoicing'. In many cultures, it functions as a modern, informal diminutive rather than a formal given name.