Voldemort's name means "full of death". (Maybe "thief of death".)

Sure? https://en.wikipedia.org/wiki/Lord_Voldemort :

Some literary analysts have considered possible meanings in the name: Philip Nel states that Voldemort is derived from the French for "flight of death,"[10] and in a 2002 paper, Nilsen and Nilsen suggest that readers get a "creepy feeling" from the name Voldemort, because of the French word "mort" ("death") within it and that word's association with cognate English words derived from the Latin mors.[11]

http://harrypotter.wikia.com/wiki/Tom_Riddle :

the most accurate etymology of Voldemort would be the French sentence "Vol de mort" which literally means "Flight of death" (accurate considering the murder waves he commited and as his unique power). It is quite plausible that is the real etymology of his name as J.K. Rowling herself speaks French and had taught it once. The Catalan expression "vol de mort", also means "flight of death" or, since "Vol" may also be from the Latin root "volere" (will or desire), may mean "death wish".