IPA: /ˌmɑːr.tɪˈrɒl.ə.dʒɪst/
KK: /mɑrˈtɪrələdʒɪst/
A person who studies the lives and deaths of martyrs, often focusing on their sacrifices for their beliefs.
The martyrologist presented a detailed analysis of the historical figures who died for their faith.
Martyrologist → It is formed from "martyrium" (from Greek "marturion", meaning witness or martyr) and "-logist" (from Greek "logia", meaning study or discourse). A martyrologist is someone who studies or writes about martyrs and their stories.
Think of a 'witness' ('martyrium') to significant events and someone who 'studies' ('-logist') those events — that's what a martyrologist does.