Lilliann sits next to 5 phonetic neighbors — Lillian, Lily, and Lilian are the closest matches by sound. Most share Lilliann's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lily flower"
"beloved beautiful one"
"dear child (term of endearment)"
"strong ruler"
"greatest, largest (from Latin Maximus)"
"heaven (spelled backward)"
"new star by the lake"
"noble, nobility"
"brilliant and pure"
"to flourish, to bloom"
"beloved, darling"
"white, bright"
"strong noblewoman"
"from Laurentum, laurel-crowned"
"dream, vision"
"meadow, woodland clearing"
"small; humble"
"modern constructed name"
"of Magdala"
"heavenly, sky (via Hawaiian/Polynesian -ani)"
"royal, celestial (via lani)"
Similar sound: These names share phonetic patterns with Lilliann — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Lilliann.
Rhythm: Lilliann is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.