Lillianne sits next to 4 phonetic neighbors — Lillian, Liliane, and Lilianna are the closest matches by sound. Most share Lillianne's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lily flower"
"to praise, glorify God"
"beau/belle — handsome, fine"
"faithful, devoted"
"judged, vindicated"
"from the Adriatic, flock of God"
"courageous, valiant"
"hardworking, industrious (via Millicent)"
"noble"
"unicorn of the East, divine omen"
"honey"
"alive, full of life"
"to love, to wish (proto-Indo-European root of Veneti)"
"island of apples"
"elegance, goodwill"
"God will add, God is gracious"
"wished for child"
"white warrior"
"delicate, lace-like"
"chalk landing place"
"lily flower, purity"
Similar sound: These names share phonetic patterns with Lillianne — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Lillianne.
Rhythm: Lillianne is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.