3 adjectives to describe stadtholders

The princess-dowager of Orange, and Du Maurier, the French ambassador, had vainly implored mercy for the innocent victim at the hands of the inexorable stadtholder.

Heinsius, the grand pensionary, followed up the views of the lamented stadtholder with considerable energy, and was answered by the unanimous exertions of the country.

It is not William, the sixth stadtholder, whom the nation recalls, without knowing what to hope or expect from him; but William I. who offers himself as sovereign prince of this free country."

3 adjectives to describe  stadtholders