Youthful or downy-bearded
Julianys is a modern elaboration of the name Julia, which stems from the Roman family name Julius. It likely refers to being youthful or dedicated to the Roman god Jupiter. This specific suffix variation is common in Caribbean Spanish-speaking communities, particularly Puerto Rico.
Less common today
Julianys isn't in the latest US Top 1000. It last peaked at #9,728 in 2018.
US births per 5-year period, 1990βpresent (SSA data).