This is the 7990th most frequent French word.
sébastien
"Sébastien" is a French proper noun, primarily used as a male given name equivalent to "Sebastian" in English.
Proper noun: used as a personal name.
Sébastien est mon ami.
Sébastien is my friend.
Proper noun: used to refer to a specific individual.
Je viens de parler à Sébastien au téléphone.
I just spoke to Sébastien on the phone.
Proper noun as part of a title or designation, indicating a namesake origin.