Gracious
Shawntia is a modern American rhythmic elaboration of Shawn, which is the Irish form of John. It combines the traditional meaning of 'God is gracious' with the popular '-tia' suffix common in African American naming traditions.
Less common today
Shawntia isn't in the latest US Top 1000. It last peaked at #4,975 in 1992.
US births per 5-year period, 1990βpresent (SSA data).