Meanings of zealous adherents in English

One of the pope's most zealous adherents was the Bishop of Gortz.

The clergy were still resolute to exclude all but their most zealous adherents.

The most crazy people being, I fear, some of my own too zealous adherents.

The nobles hated Joazar, the high-priest; the Separatists, on the other hand, were his zealous adherents.

I had been told that these gentlemen were the most zealous adherents of the French alliance, and the most ardent admirers of Napoleon.

Perhaps he was disheartened by the total failure of the united efforts of himself and Sigismund, with their honest and zealous adherents, at Constance.