Beautiful or God is gracious
Shainna is a modern variation likely derived from the Yiddish name Shaina, meaning 'beautiful', or influenced by the Irish name Shauna, a feminine form of Sean meaning 'God is gracious'. It represents a blend of phonetic styles popular in late 20th-century American naming.
Less common today
Shainna isn't in the latest US Top 1000. It last peaked at #7,200 in 1990.
US births per 5-year period, 1990βpresent (SSA data).