I also find this origins of the word: from Middle English "quene" (“young, robust woman”), from Old English "cwene" (“woman, female serf”), from Proto-West Germanic "kwenā" and Proto-Germanic "kwenǭ" (“woman”).
In the past, as someone interested in this tag, I wrote queen instead of quean, and found only the ironic use of the word in the meaning of wife of willing cuckold husband, like: he's her cuckold, she's his cuckqueen
Or in stories about an unfaithful or cuckqueanian queens, when a character are literally queen of some title. By the way, the term "size queen" is spelled with "queen".