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
TuÂN	-	Vietnamese
Saffron	SAF-rən	English (Rare)
Darshan	-	Indian, Hindi, Marathi, Gujarati, Kannada
Tyrone	tie-RON	English
Numitor	-	Roman Mythology
Tibor	-	Hungarian, Czech, Slovak