Müller-Koppe, Jens, "Fenker Research Report", providing extract from his 1852 Kingdom of Hannover census project, shows name as Fr. Hr.
Taufregister (Baptism Register), Kingdom of Hanover, 1862, pg 106, no. 24, Friedrich August Fenker, shows name as Brinksitzer (farmer) Friedrich Hinrich Bültemeyer (so named after his former place), neé Fenker (according to his current place named: Kuhlmann.)