Follower of Demeter or half-goddess
Demyah is a modern American invention, likely created as a creative variation of Demetria or Demi. It draws its roots from the Greek name Demeter, the goddess of agriculture, or may be used as a rhythmic blend with the popular '-yah' suffix.
Less common today
Demyah isn't in the latest US Top 1000. It last peaked at #7,344 in 2018.
US births per 5-year period, 1990βpresent (SSA data).