known quantity

someone whose character, personality, and behavior are recognized and understood. We need not worry about how John will behave. He is a known quantity. Lisa is a known quantity and I am sure she will not surprise us by voting with the opposition.

Common Names:

Name	Pronounced	Usage
Hoshea	-	Biblical, Biblical Hebrew
Selima	-	Arabic
Njord	-	Norse Mythology, Swedish, Norwegian, Danish
Timotei	-	Bulgarian, Romanian
Theofilus	-	Dutch (Rare)
Ming	-	Chinese