More on Proto-martyr from Infoplease:

• Proto-martyr - Proto-martyr The first martyr. Stephen the deacon is so called (Acts v. vii.). Source: Dictionary ...
• Thecla - Thecla (St.), styled in Greek martyrologies the proto-martyress, as St. Stephen is the ...
• Dictionary of Phrase and Fable: P - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "P"