Which preposition to use with hospodars

in Occurrences 1%

WOIWODE, name at one time of an elective prince among the Slavs, originally one chosen in some emergency; superseded by Hospodar in 1716.

of Occurrences 1%

Moreover, it was agreed that the hospodars of the principalities should be elected for life, to rule without molestation from the Porte upon paying a trilling tribute.

Which preposition to use with  hospodars