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
Kreios	-	Greek Mythology
Vijay	-	Indian, Hindi, Marathi, Tamil, Kannada, Telugu, Malayalam, Punjabi
BÚI	-	Ancient Scandinavian
MetİN	-	Turkish
Peregrinus	-	Late Roman
Enfys	EN-vis	Welsh