queen

Queen goes back ultimately to prehistoric Indo-European *gwen- ‘woman’, source also of Greek gunḗ ‘woman’ (from which English gets gynaecology), Persian zan ‘woman’ (from which English gets zenana ‘harem’), Swedish kvinna ‘woman’, and the now obsolete English quean ‘woman’. In its very earliest use in Old English queen (or cwēn, as it then was) was used for a ‘wife’, but not just any wife: it denoted the wife of a man of particular distinction, and usually a king. It was not long before it became institutionalized as ‘king’s wife’, and hence ‘woman ruling in her own right’.