"Blend of Quan and Darius"
The name Quandarius is commonly a male name from the "English" origin.
Quandarius is a modern American coinage that joins the element Quan, which also appears in names such as Dequan and Quanisha, to Darius. It first appears in United States birth records in 1989, and its -arius ending matches a group of American invented names from the same period, among them Demarius and Jamarius. No earlier use of the name in another language is recorded.
The pronunciation of Quandarius is kwahn-DAIR-ee-us.