The name Liliom is a girl's name of Hungarian origin meaning "lily".

This rare, unisex name may appeal to those who love Leah, Lillian, Lily, and Lumi, but also those wanting to honor a family William or Liam. It comes from the Hungarian word for "lily", and has been used since the 9th or 10th century. Most notably, it appeared in the 1909 play Liliom by Ferenc Molnár (along with the subsequent musical Carousel), and while it appeared on a male character, it has been used (sparingly) across the genders.

Flower Names for Girls (with Meanings)

Liliom

Hungarian

The name Liliom is a boy's name of Hungarian origin meaning "lily".

A floral and unisex Hungarian name, Liliom feels close enough to Liam and to Lilian that it could work across any gender. Derived from the Latin lilum, it has been used since the 9th or 10th century in Hungary and has a literary history, thanks to the play Liliom by Ferenc Molnár, in which it was used for a male character.
 
The play went on to inspire the musical Carousel along with a number of other films, though as a name, Liliom remains a very rare choice.

Liliom

Liliom Origin and Meaning