Likely a modern variant of Mariah or Liora
Lariah is a modern American invention, likely created as a blend of the popular name Mariah with the 'L' prefix. It may also be influenced by the Hebrew name Liora, meaning 'my light', or the name Alariah. Because it is a contemporary creation, it lacks a singular historical etymology.
Less common today
Lariah isn't in the latest US Top 1000. It last peaked at #2,003 in 2009.
US births per 5-year period, 1990βpresent (SSA data).