Ashwyna can be another form. Source: https://oswinkinsey.wordpress.com/ [See document titled "English Compound Names". "Ashwyna" is at page 112])Based on endings of other Old English feminine names ending in -wynn (like -wyn, -wynne, -wen, -wena and -wenna), I imagine that Ashwyn, Ashwynne, Ashwen, Ashwena and Ashwenna could work as other forms. Unfortunately I can't find sources showing these though.
Based on endings of other Old English feminine names ending in -wynn (like -wyn, -wynne, -wen, -wena and -wenna), I imagine that Ashwyn, Ashwynne, Ashwen, Ashwena and Ashwenna could work as other forms. Unfortunately I can't find sources showing these though.