Gracious
Shawnia is a modern American elaboration of Shawna, which is a feminine form of Sean. It ultimately derives from the Hebrew name Yochanan, meaning 'God is gracious'. The addition of the 'ia' suffix gives it a more rhythmic, feminine flair common in late 20th-century naming trends.
Less common today
Shawnia isn't in the latest US Top 1000. It last peaked at #5,371 in 1996.
US births per 5-year period, 1990βpresent (SSA data).