DMGS was founded on 25 January 1925 by the Church Missionary Society (CMS) in memory of Archdeacon T. J. Dennis.

Humans of Dengram is open for anyone that had contact with “Dennis Memorial Grammar School, Onitsha” either as a student, Old boy, teacher, staff, or simply an admirer. TO SHARE THEIR STORY ABOUT THEIR ENCOUNTER WITH D.M.G.S. Humans of Dengram (HoD) exist to challenge and inspire everyone. You don’t need to be a high achiever or an Old Boy to inspire others. Your story matters.

Thomas John Dennis (1869–1917) was an Anglican priest who was the main translator of the Bible into the Igbo language. Dennis was born on 17 September 1869 in Langney, Sussex, and grew up in Cuckfield, Guestling, and St Leonards. He was the oldest of eight children, and four of his siblings later joined overseas Christian mission work. Because he had not completed his education, he trained at the Church Missionary Society (CMS) institutions in Clapham and Islington after applying in 1889. He was ordained at St Paul’s Cathedral in 1893 and briefly served as an assistant curate at St Mary’s, Islington.