P0617200 (prō′tō-mär′tər)n. The first martyr for a given cause or in a given place. Used especially of the first Christian martyr, Saint Stephen.
protomartyr
(ˌprəʊtəʊˈmɑːtə) n1. (Ecclesiastical Terms) St Stephen as the first Christian martyr2. (Ecclesiastical Terms) the first martyr to lay down his life in any cause