The surname Franck is of Norman origin, introduced into England after the Conquest of 1066. It is a patronymic of the Norman given name "Franc", in origin an ethnic name for a Frank, a member of the Germanic people who inhabited the lands around the river Rhine in Roman times. In the 6th Century, under their leader Clovis 1, the Franks stablished a substantial empire in central Europe, which later formed the basis of the Holy Roman Empire.
The Franks eventually gave their name to the country France, so in that sense, Franck is of French origin.