Judged or vindicated
Daynah is a modern spelling variant of the Hebrew name Dinah. In the Old Testament, Dinah was the daughter of Jacob and Leah, and the name carries the etymological sense of being judged or acquitted.
Less common today
Daynah isn't in the latest US Top 1000. It last peaked at #11,988 in 1998.
US births per 5-year period, 1990βpresent (SSA data).