Modern invented name, likely combining Nyla and Asia.
Nylasia is a contemporary American creation. It likely blends the name Nyla, which has Arabic roots meaning 'attainer', with the popular suffix -asia, inspired by the continent or names like Alicia and Keasia.
Less common today
Nylasia isn't in the latest US Top 1000. It last peaked at #13,174 in 2008.
US births per 5-year period, 1990βpresent (SSA data).