Any of various nymphalid butterflies of the genus Tanaecia (genus). Other butterflies in this genus are called counts and viscounts.
Origin
From Middle English erle, erl, from Old English eorl, from Proto-Germanic *erlaz (compare Old Norse jarl, Old High German and Old Saxon erl), from Proto-Germanic *erōną, *arōną (compare Old Norse jara), from Proto-Indo-European *h₃er- (compare Latin orior, Ancient Greek ὄρνυμι ("to urge, incite"), Avestan 𐬆𐬭𐬆𐬥𐬀𐬊𐬌𐬙𐬌, Sanskrit ऋणोति). Also displaced unrelated but similar ealdorman.
Modern English dictionary
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