. "Filius/Filia [FEE-lee-oos/-ah-]- (Son/Daughter Plural filii, filiae) is the term for one's former apprentice, who is now a magus."@en . "Filius/Filia [FEE-lee-oos/-ah-]- (Son/Daughter Plural filii, filiae) is the term for one's former apprentice, who is now a magus."@en . "Filius"@en .