Gwendalyn sits next to 3 phonetic neighbors — Gwendolyn, Gwendoline, and Gwendolen are the closest matches by sound. Most share Gwendalyn's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fair, blessed, holy"
"suffering, enduring"
"tile maker, one who lays tiles"
"mighty in battle"
"light, shining"
"lapis lazuli, precious blue stone"
"from the round hill"
"rising sun"
"land where rye is grown"
"pure, spotless"
"brave, powerful (via Emery)"
"nobility, gentle character"
"moon"
"rock (alternative etymology)"
"gift (via Kyra/Kyros)"
"auspicious, blessed"
"member of the Gauts tribe"
"dear one, darling"
"love, beloved"
"ruler of the elves"
"guarded by God"
Similar sound: These names share phonetic patterns with Gwendalyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Gwendalyn.
Rhythm: Gwendalyn is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.