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
SÉRaphine	se-ra-FEEN	French
MiĶElis	-	Latvian
Elina	E-lee-nah (Finnish), e-LEE-nah (Swedish)	Finnish, Swedish
MiglĖ	-	Lithuanian
RagnfrÍ&Eth;R	-	Ancient Scandinavian
Rhiannon	hri-AN-ahn (Welsh), ree-AN-ən (English), REE-ən-ən (English)	Welsh, English, Welsh Mythology