Analysis of information sources in references of the Wikipedia article "オーク (架空の生物)" in Japanese language version.
I originally took the word from Old English orc (Beowulf 112 orc-neas and the gloss orc: þyrs ('ogre'), heldeofol ('hell-devil')).[注 10] This is supposed not to be connected with modern English orc, ork, a name applied to various sea-beasts of the dolphin order".[22][23]