I used to dislike it, but after reading a webcomic with a Gwendolyn, the name became a favorite. Just hearing it more, and in a positive context, helped the name cross the divide from "old and stuffy" to "sweet, flowing, and poetic".
Edit: Just noticed that you're asking about a different spelling. I prefer the -lyn ending because it keeps the flow and poetry. The -line ending is more crisp. Would be concerned that people might hard-pronounce the -line ending. Not my preference, but also not bad.
This message was edited 8/14/2023, 9:32 AM