It can be, and probably is in many cases, but it also occurs as a Manx and Scottish last name. If you mean as a first name it has been used in the U.S. as a male and a female name, but seems to be largely female recently.
Kelly is an Irish name meaning "Bright-Headed"
In Irish it is spelled Ceallach, Kelly (used by male/female)A similar female name was Ceallsach.
either name is better.. but there is this girl at school who bothers me and her name is kelly. so i perfer the name shannon and shannon means waterlilly in irish.
It can be Irish, English, Welsh or Scottish. (surname database)
Kelly has no meaning in Hebrew. You're only option is to write it phonetically as קלי
The surname Kelly comes from Ireland, coming from the Irish word Ceallach, which means contention or strife.
Paul Kelly - Irish musician - was born in 1957.
Sean Kelly - Irish republican - was born in 1972.
Jimmy Kelly - Irish footballer - died in 1970.
The name Kelly is used for both girls and boys, but more frequently for girls. It is from Irish Gaelic and may have originally referred to strife or battle.
William James Kelly goes by Irish, The Irish Siggie, Liam, and Liam Kelly.
Kelly is of Irish and Gaelic origin and means 'strife', 'war', 'warrior' or 'bright-headed'.