Its source is gaudium, an English name meaning "Delight."
The name Joi ranked 2012th in popularity for females of all ages in a sample of the 1990 US Census.
Though this name appears on the 1990 U.S. Census lists, it is used by only a small percentage of the general population.
The English word ''joy'' derives from the Latin term gaudium. That term might have been a source of the Latin name Gaius (sometimes spelled Caius), which survives in the form of the male English names Jay and Kay.