Earth or to dry
Terriah is a modern American elaboration of the name Terra or Terry. It likely derives from the Latin 'terra', meaning earth, or the Greek 'therizein', meaning to harvest.
Less common today
Terriah isn't in the latest US Top 1000. It last peaked at #8,924 in 2013.
US births per 5-year period, 1990βpresent (SSA data).