God has heard
Semaja is a modern American creation, likely derived from the Hebrew name Shemaiah or influenced by the name Samaja. It carries the etymological meaning of 'God has heard' or 'heard by Yahweh.' While rare, it follows the phonetic trends of names like Samara or Jada.
Less common today
Semaja isn't in the latest US Top 1000. It last peaked at #7,761 in 2004.
US births per 5-year period, 1990βpresent (SSA data).