What does arendator mean?
The definition of arendator
Ar`en*da”tor, n.
Etym: [LL. arendator, arrendator, fr. arendare, arrendare, to pay rent, fr. arenda yearly rent; ad + renda, F. rente, E. rent. Cf. Arrentation and Rent.]

In some provinces of Russia, one who farms the rents or revenues.

Note: A person who rents an estate belonging to the crown is called crown arendator. Tooke.