I found these fascinating, thought you guys might too, :)
And yeah, it's not ALL Death Eaters, but they're all Slytherins, :P
Bellatrix - “Bella” is a construct of the word “bellum” meaning “war” and “trix” refers to “a woman in power.” Bellatrix is therefore known as the “Female Warrior” and is also the pale yellow star indicating the left shoulder of the constellation Orion, the Great Hunter.
Blaise - Blaise was the teacher of Merlin. From the Roman name Blasius, which means “lisping.” From the Latin “blaesus.” A famous bearer was Blaise Pascal, a French mathematician and philosopher.
Draco - Draco is a constellation that looks like a dragon but is a snake. In Latin, Draco means “dragon.” There was also a Greek ruler named Draco who developed a system of severe punishments for the smallest of crimes. “Draconian” means “harsh or cruel.” In Romanian, “drac” means “devil.”