From the English word
felicity meaning
"happiness", which ultimately derives from Latin
felicitas "good luck". This was one of the virtue names adopted by the
Puritans around the 17th century. It can sometimes be used as an English form of the Latin name
Felicitas. This name jumped in popularity in the United States after the premiere of the television series
Felicity in 1998. It is more common in the United Kingdom.