Gracious
Janeyah is a modern American creation, likely a rhythmic elaboration of Jane or Janie. It combines the classic Hebrew roots of Jane with the popular '-yah' or '-iah' suffix, giving it a contemporary, melodic feel.
Less common today
Janeyah isn't in the latest US Top 1000. It last peaked at #13,921 in 2015.
US births per 5-year period, 1990βpresent (SSA data).