Lily flower
A modern American elaboration of the name Lily, likely influenced by the Latin 'lilium' and the suffix '-onna'. It combines the classic floral imagery of the lily with a more rhythmic, multi-syllabic ending.
Less common today
Lillionna isn't in the latest US Top 1000. It last peaked at #7,264 in 2014.
US births per 5-year period, 1990βpresent (SSA data).