Nasia is a Greek female name, deriving from the name Athanasia. Although both nicknames, Nasia is the female respective of name Nasos, which derives from the male name Athanasios.
Sound of name Nasia: Ná – sia
Male version of name Nasia: Nasos
Nameday of name Nasia: January 18th and May 2nd
Origin of name Nasia – Athanasia – Athanasios the Great
As mentioned, name Nasia is a nickname and diminutive of name Athanasia, therefore, it refers to Athanasios of Alexandria, also known as Agios Athanasios (St Athanasius). Additional information on the name Athanasia and its meaning can be found at the pertinent post for name Athanasia.