Which preposition to use with separatist

of Occurrences 2%

It snowed all the next day, and the roads were deep in water, so that M.S. and M.T. remained in-doors; but J.Y. and W.S. walked to Homburgshausen, a village about a mile and a-half from Berlenburg, to call upon an aged man, a Separatist of the old connection.

in Occurrences 1%

Both the one movement and the other naturally evoked great alarm and emotion in the Austrian and Hungarian capitals, as they were seen to be genuinely popular and also potentially, if not actually, separatist in character.

Which preposition to use with  separatist