Gracious
A modern American creation, Dashauna combines the popular prefix 'Da-' with the name Shauna. Shauna is the feminine form of Shaun, which is an Irish variation of John, ultimately derived from the Hebrew name Yochanan meaning 'God is gracious'.
Less common today
Dashauna isn't in the latest US Top 1000. It last peaked at #6,894 in 1995.
US births per 5-year period, 1990βpresent (SSA data).