Kylian

Kylian is a spelling used in French of the Irish name Cillian. The deeper origin of Cillian is debated, with explanations involving a church or an older personal-name element. Those proposals make it more accurate to identify the established name family than to give Kylian a single unquestioned meaning such as war or strife.

Footballer Kylian Mbappé is a recognizable bearer, but the spelling existed before his fame. Killian is another international form, while Cillian preserves the Irish spelling. The names may sound similar across languages, though not every community pronounces them identically. A family can choose the form that best preserves its intended language connection.