Peaceful or God is gracious
Shantia is a modern American invention, likely created by blending the prefix 'Shan-' with the suffix '-tia'. It is often associated with the name Shanti, which means 'peace' in Sanskrit, or as a variation of names like Shawna or Ashanti.
Less common today
Shantia isn't in the latest US Top 1000. It last peaked at #2,192 in 1990.
US births per 5-year period, 1990βpresent (SSA data).