C2 noun /ˈproʊtoʊˌmɑːrtɚ/
protomartyr
erster Märtyrer
Meaning
The first martyr in a cause or religion, often referring to the first Christian martyr.
Example
St. Stephen is known as the protomartyr of Christianity.
Heiliger Stephanus ist als der Protomärtyrer des Christentums bekannt.