Supplanter or replacement
Jamyia is a modern American creation, likely a feminine elaboration of the name James or Jamie, influenced by the popular '-ia' suffix. It shares the etymological roots of James, which traces back to the Hebrew name Jacob, meaning 'supplanter'.
Less common today
Jamyia isn't in the latest US Top 1000. It last peaked at #2,953 in 2003.
US births per 5-year period, 1990βpresent (SSA data).