de rigeur

(formal)

if something is de rigeur, it is necessary if you want to be thought fashionable or if you want to follow a custom Leather jackets and jeans are still de rigeur for hard rock fans.

Common Names:

Name	Pronounced	Usage
Octave	-	French
Leona	lee-O-nə (English), LE-o-nah (German)	English, German
Gjon	-	Albanian
Cyrano	SIR-ə-no (English)	Literature
Josie	JO-zee	English
Vjekoslav	-	Croatian