Friend of the horse
A modern variant of the Old English name Eowyn, famously created by J.R.R. Tolkien. It combines the elements 'eoh' meaning horse and 'wyn' meaning joy or friend. While rare, it is often chosen by parents seeking a literary connection with a unique spelling.
Less common today
Aowyn isn't in the latest US Top 1000. It last peaked at #11,356 in 2009.
Shieldmaiden of Rohan who slays the Witch-king Β· The Lord of the Rings
US births per 5-year period, 1990βpresent (SSA data).