Possibly princess or commanding
Ameriah is a modern American creation, likely a blend of the name Amira and the popular '-iah' suffix found in biblical names. While it lacks a singular ancient root, it is often associated with the Arabic 'Amira' meaning princess or the Hebrew 'Amariah' meaning 'Yahweh has said'.
Less common today
Ameriah isn't in the latest US Top 1000. It last peaked at #5,063 in 2009.
US births per 5-year period, 1990βpresent (SSA data).