Yes

25) How did the people of Transylvanian accept the teaching of Francis David?

The greater part of the Hungarian people of Transylvanian along with King John Sigismund became followers of the pure Christianity of Jesus as it was taught by Francis David. This religion was named Unitarianism, from the doctrine of the unity of God.

The word 'Unitarian' is of Latin origin, deiving from 'unus', 'unitas', and refers to the "believers in one God who profess the indivisible unity of God." The Unitarian name was first used in 1600 at the Diet of Lécfalva.