en_tn/num/04/33.md

under the direction of Ithamar son of Aaron the priest

The word "direction" is an abstract noun that is expressed by a verb. AT: "as Ithamar son of Aaron the priest directs them" (See: rc://en/ta/man/translate/figs-abstractnouns)

Ithamar

See how you translated this man's name in Numbers 1:2.