Meaning Gwendolen is a girls name of Celtic and Welsh origin, it means 'blessed, holy, smooth'.https://www.youtube.com/watch?v=erDGKUBhUp4 Origin of Gwendolen Welsh , Celtic Popular Middle Names Mary Pronunciation 🔊 Listen Gwendolen Similar Names Gwendoline Afric Taqwe Teegah Teagen Trinith Arieen Glan Berget Gwenyver Year by Year Popularity of Gwendolen