Modern invented name, possibly meaning of Asia
Deashia is a modern American creation, likely formed by combining the popular prefix 'De-' with the name Asia. While it does not have a singular ancient etymology, it is often interpreted as a creative variation of the name of the largest continent.
Less common today
Deashia isn't in the latest US Top 1000. It last peaked at #4,706 in 1999.
US births per 5-year period, 1990βpresent (SSA data).