Lily; a symbol of purity
Lilliannah is an elaborate modern elaboration of Lillian, which itself is a diminutive of Lily. It ultimately derives from the Latin word 'lilium', representing the flower that symbolizes innocence and purity. The double 'n' and 'h' ending are contemporary stylistic choices to add a more decorative and unique flair to the classic name.
Less common today
Lilliannah isn't in the latest US Top 1000. It last peaked at #9,341 in 2016.
US births per 5-year period, 1990βpresent (SSA data).