Youthful or sky father
A modern elaboration of Julia or Juliana, likely combining the Latin roots of Julius with the popular 'onna' suffix. It ultimately traces back to the Roman family name Julius, which is associated with the god Jupiter and the concept of youthfulness.
Less common today
Julionna isn't in the latest US Top 1000. It last peaked at #7,995 in 2009.
US births per 5-year period, 1990βpresent (SSA data).