Axum got nothing to do with the current tigragna speaking people. The place was inhabited by Agew Amharas Kunama, bilen Irob..axum civilization is amhara civilization tigere ppl came to axum as slaves they weren’t even a ruler they were servants even the word tigere means a slave.
Aksum derives from the Agew word Aku- which means Water and -shum which means gifted or promoted. Aksum means Gifted by Water.