God has been gracious
Jacia is likely a modern feminine elaboration of the name Jane or a variant of Jacia, often linked to the Hebrew root meaning 'God is gracious'. It may also be used as a shortened form of names like Jacinta or Jacinda in some cultures.
Less common today
Jacia isn't in the latest US Top 1000. It last peaked at #8,126 in 1999.
US births per 5-year period, 1990βpresent (SSA data).