Eureka (word)
The exclamation 'Eureka!' is attributed to the ancient Greek scholar Archimedes. He reportedly proclaimed "Eureka! Eureka!" after he had stepped into a bath and noticed that the water level rose, whereupon he suddenly understood that the volume of water displaced must be equal to the volume of the part of his body he had submerged. (This relation is "not" what is known as Archimedes' principle—that deals with the "upthrust" experienced by a body immersed in a fluid.) He then realized that the volume of irregular objects could be measured with precision, a previously intractable problem. He is said to have been so eager to share his discovery that he leapt out of his bathtub and ran naked through the streets of Syracuse.
Herja
Rudolf Simek says the name is etymologically related to the Old Norse "herja" and Old High German "herjón" (meaning "devastate"), and derives from Proto-Germanic word "*Herjaza". Simek notes that the Continental Germanic goddess name "Hariasa" (attested from a now lost 2nd century stone found in Cologne, Germany) also derives from "*Herjaza", but says that "it is almost impossible to say whether Herja was an original name of a goddess including among the North Germanic peoples," and that "an independent development is equally likely in the case of a 'goddess of war'."