thief in the night

A person or thing that moves in a swift and secretive, stealthy, or surreptitious manner. The cancer spread through my lungs and into my bones like a thief in the night, giving me no chance of beating it.

Common Names:

Name	Pronounced	Usage
LÜTfÜ	-	Turkish
Bianca	[bi'æŋkə]
Klaus	KLOWS (German, Finnish)	German, Danish, Norwegian, Finnish
Darius	[də'raiəs]
Othniel	AWTH-nee-əl (English)	Biblical
Reshmi	-	Indian, Hindi, Bengali