Morgana sits next to 4 phonetic neighbors — Morgan, Morgaine, and Morrigan are the closest matches by sound. Most share Morgana's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sea circle, sea born"
"chalice, holy cup"
"bright, shining one"
"sun, solar energy"
"radiant, shining"
"air, melody"
"region of simplicity, beauty, and innocence"
"blue, the color of sky and sea"
"great, venerable, majestic"
"told by God"
"pure, clear"
"little hollow in the land"
"forest, woodland"
"God is gracious (feminine form)"
"generous, joyful"
"hail, greetings"
Similar sound: These names share phonetic patterns with Morgana — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Welsh mor + cant origins, giving them the same cultural heritage as Morgana.
Rhythm: Morgana is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.