Likely a modern variation of Malani, meaning heavenly or sky.
Malahni is a contemporary American coinage, most likely derived from the Hawaiian name Malani or the Sanskrit name Malini. In a Hawaiian context, it relates to the sky or heavenly realms, while the Sanskrit root refers to a florist or garland-maker. Its use in the US is very recent, following the trend of melodic, multi-syllabic names ending in 'ni'.
Less common today
Malahni isn't in the latest US Top 1000. It last peaked at #4,038 in 2022.
US births per 5-year period, 1990βpresent (SSA data).