Origin of earl
- Middle English erl nobleman of high rank from Old English eorl
From American Heritage Dictionary of the English Language, 5th Edition
- Middle English erl, from Old English eorl, from *erlaz (compare Old Norse jarl, Old Saxon/Old High German erl), from *erōną, *arōną (compare Old Norse jara (“fight, battle”)), from Proto-Indo-European *h₁er- (compare Latin orior (“to rise, get up”), Ancient Greek [script?] (órnēmi, “to urge, incite”), Avestan [script?] (ərənaoiti, “to move”), Sanskrit [script?] (ṛṇóti, “to arise, reach, move, attack”)).