I would not know how to spell or pronouce Anwen; my tongue would trip all over it, do you say it Anwin or Anwen? Is that an E or an I for the second vowel?, etc.
Ann, Anna, Emma, Julie, Julia, Sarah, Jaqueline, Karen, Eve
Martha, Nicola, Josephine, Victoria, Louise
Helen, Ellen, Mary, Rosemary, Millicent, Joanne, Judith, Diana, Penelope
A lot of the names suggested by others are neither what I could call 'recognisable' nor obvious how to pronounce imho.