Gracious
Iasia is a modern American elaboration of the name Asia or a feminine variant of Isaiah. It is often interpreted as a blend of the Hebrew name meaning 'God is salvation' and the Greek name for the eastern continent.
Less common today
Iasia isn't in the latest US Top 1000. It last peaked at #4,027 in 2000.
US births per 5-year period, 1990βpresent (SSA data).