Lua sits next to 4 phonetic neighbors — Luna, Lula, and Lola are the closest matches by sound. Most share Lua's Portuguese-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"moon"
"sky blue"
"from Ávila"
"capricious, whimsical"
"beautiful"
"holy, sacred, saintly"
"river"
"miraculous, worthy of wonder"
"grace, favor"
"pure, clear"
"victor's crown from athletic games"
"of noble kind"
"short form of Isabella"
"short form of Antonia/Antoinette"
"torch, light"
"God will increase"
"bee"
"torch, light"
"lovable, dear, beloved"
Similar sound: These names share phonetic patterns with Lua — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Lua.
Rhythm: Lua is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.