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
Ormazd	OR-mazd	Persian Mythology
Husni	hus-NEE:	Arabic
Azubuike	-	Western African, Igbo
Minali	-	Indian, Hindi
Ambler	['æmblə]
Marcella	-	Italian, German, Ancient Roman