F. G. Jannaway (London 1859-1935) was an English Christadelphian writer on Jewish settlement in Palestine, and notable for his role in the conscientious objector tribunals of World War I. His reaction to controversy was to separate from others in the name of purity, and he was instrumental in the formation of minority factions, such as the Berean Christadelphians. However, this reasoning eventually caused him to separate even from his own brother, A.T.Jannaway.
Frank George Jannaway was born in Kensington, Brompton in 1859. He became a Christadelphian following his two elder brothers William John (1847-1882) and Arthur Thomas Jannaway (1854–1938).
Jannaway gave regular public lectures at the South London Ecclesia first at Westminster, from 1882 then at Islington and Clapham, and was a notable debater. His debates were not just on doctrinal subjects (e.g. 1894), but also, more unusually for Christadelphians, on the subject of Christian Socialism (1908, 1909).
Christadelphians had taken an active interest in not just predicting, but actually assisting in a Jewish return to Palestine since 1891 when Roberts called on the Christadelphian community to support Laurence Oliphant's appeal for funds for the Rosh Pinna settlement at Al-Ja'una in Galilee. But even among Christadelphians F.G. Jannaway expressed exceptionally strong sympathy for the return of the Jews to Palestine. His two books which deal with this Palestine and the Jews (1914) and Palestine and the Powers (2nd Ed. 1918) were summarized and referenced in an overtly Zionist appeal Palestine and the world (1907, 1922): "F.G. Jannaway has for long been known for his interest in and strong sympathy with the return of the Jews to Palestine."
F.G. Jannaway visited Palestine four times, in 1901, 1902, 1912 and 1914 in the company of Charles Curwen Walker, editor of The Christadelphian.