Which preposition to use with monophysites

in Occurrences 1%

COPTS, the Christian descendants of the ancient Egyptians, who are Monophysites in belief, some regarding the Patriarch of Alexandria and some the Pope as their head; they adhere to the ancient ritual, are prelatic, sacramentarian, and exclusive; they speak Arabic, their original Coptic being as good as dead, though the grammar is taught in the schools.

Which preposition to use with  monophysites