Likely a modern variation of Jeremiah or a creative coinage.
Kemyah is a contemporary American name likely created by blending rhythmic sounds or as a feminine variation of the Hebrew name Jeremiah, meaning 'Yahweh has uplifted'. It follows the popular trend of adding a 'Ke-' prefix to established name endings. Because it is a modern invention, it does not have a single ancient etymological root.
Less common today
Kemyah isn't in the latest US Top 1000. It last peaked at #8,046 in 2008.
US births per 5-year period, 1990βpresent (SSA data).