Lulu sits next to 4 phonetic neighbors — Lola, Lila, and Luna are the closest matches by sound. Most share Lulu's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pearl; precious gem"
"sea of bitterness"
"peace (from Irene element)"
"swift, agile"
"beloved one by the lake"
"gracious one"
"black-haired, dark wisdom"
"modern coined name"
"chief, noble one"
"possibly exalted, praised (from -iyah pattern)"
"white shadow, fair phantom"
"my God has answered me"
"rival, striving"
"rye clearing plus lake"
"creative American coinage blending lyrical sounds"
"graceful (via -lynn suffix)"
"rising sun, radiant dawn"
"dry, dry earth"
"industrious, striving"
"little bird"
Similar sound: These names share phonetic patterns with Lulu — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Lulu.
Rhythm: Lulu is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.