Johann Heinrich Heidegger

[1] He studied at Marburg and at Heidelberg, where he became the friend of J. L. Fabricius, and was appointed professor extraordinarius of Hebrew and later of philosophy.

In 1659, he was called to Steinfurt to fill the chair of dogmatics and ecclesiastical history, and in the same year he became doctor of theology of Heidelberg.

[1] In 1660 he revisited Switzerland and, after marrying Elisabeth von Duno, he travelled in the following year to Holland, where he made the acquaintance of Johannes Cocceius.

[1] Heidegger was the principal author of the Formula Consensus Helvetica in 1675, which was designed to unite the Swiss Reformed churches, but had an opposite effect.

[1] His writings are largely controversial, though without being bitter, and are in great part levelled against the Roman Catholic Church.