Johann Gerhard Oncken

Johann Gerhard Oncken (26 January 1800 - 2 January 1884) was a pioneer German Baptist preacher, variously referred to as the "Father of Continental Baptists", the "Father of German Baptists" and the "Apostle of European Baptists". Oncken, Gottfried Wilhelm Lehmann (1799–1882), and Julius Köbner (1806–1884) were known as the Baptist cloverleaf (kleeblatt). J. G. Oncken helped direct and guide the growth of Baptists throughout Germany and across much of Europe for half a century.

Oncken's theology can be described as conservative, Calvinistic, and evangelistic. He favored ministerial education, but not at the expense of spiritual preparation. He held spiritual gifts as a priority over academic preparation. His zealous methods of preaching and evangelism laid the foundation and set the example for many years to come. His work continues to leave a mark on the Baptists of Germany and Europe.