Lilianne sits next to 4 phonetic neighbors — Liliane, Lillian, and Liliana are the closest matches by sound. Most share Lilianne's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lily, pure, innocent"
"narrow strait, channel"
"modern invented name with English meadow roots"
"God is my oath"
"nobility, noble birth"
"winding stream"
"hazel tree by the woodland clearing"
"enclosed garden, place of perfect happiness"
"modern elaboration of Zora"
"festive celebration (archaic)"
"love"
"gracious rose, rose of grace"
"dove (bird of peace)"
"sky blue, the blue of a clear sky"
"from Brittany; land of the Britons"
"cherry tree or fruit"
"ruler of the land"
"sea of bitterness + pure"
"at the meadow, at the woodland clearing"
"of proud heritage"
"courageous, valiant"
Similar sound: These names share phonetic patterns with Lilianne — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Lilianne.
Rhythm: Lilianne is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.