He was born to Edmund Burchard Theophilus Koken, a professional soldier with twenty-two years of service, and his second wife, Ilsa Maria née Nieren.
After his death in 1832, Ilsa became a laundress for the royal family, to support Edmund and his eight siblings.
When he returned, he painted portraits of every Kunstlerverein member, which were published in a two-volume set.
In 1851. he married Wilhelmine Louise Meyer, the daughter of a Hanoverian state councilor.
[3] Among his numerous students may be mentioned: Ernest Augustus, Crown Prince of Hanover, Karl Eckermann [de], the son of Goethe's secretary, Johann Peter Eckermann, and the landscape painter Gustav Hausmann.