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"
"famous grace, graceful warrior"
"free one, Frenchman"
"ice rule, pledged"
"lady, woman"
"defender of the people"
"dark-complexioned, dark beauty"
"member of the Gautz/Goth tribe"
"pinkish-orange color of the sea"
"beautiful sea"
"flower"
"rain"
"well-born (short form of Luigina/Giovanna)"
"spinner dolphin"
"well-spoken, eloquent"
"protector of mankind"
"lovable, dear, beloved"
"bee"
"pearl"
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.