πρεσβύτατος

English (Woodhouse)

(see also: πρέσβυς) first in importance, first-born

Lexicon Thucydideum

natu maximus, the eldest, 1.20.2, 1.105.5, 2.13.7. 2.78.3. 6.54.2. 6.55.1. 6.55.1
antiquissimus, maximi momenti, most ancient, of greatest importance, 4.61.6.