Menno Simons was a Dutch Anabaptist theologian and leader who founded the Mennonite movement, promoting pacifism and adult baptism.
Philipp Melanchthon was a German theologian, reformer, and scholar who played a pivotal role in shaping the Lutheran Reformation alongside Martin Luther.
Philip Jakob Spener was a prominent German theologian and Lutheran minister who significantly influenced the rise of Pietism in the late 17th century.