unwritten law

An accepted although informal rule of behavior, as in It's an unwritten law that you lock the gate when you leave the swimming pool. [Mid-1400s]

Name	Pronounced	Usage
Topsy	TAHP-see	English (Rare)
Ljuba	LYOO-bah (Serbian, Croatian)	Serbian, Croatian, Czech, Slovene, Macedonian
Gweneth	-	Welsh
Jon	[dʒɔn]
Alvey	['ælvi]
Clytemnestra	klie-təm-NES-trə (English)	Greek Mythology (Latinized)