Last name: Kiefer. This interesting and unusual surname is of Germanic origin, and is a metonymic occupational name for a maker or repairer of wooden vessels such as barrels, tubs, casks and vats. The derivation is from the German kief(e), kufe, itself coming from the Old High German kuofa, barrel.
Commercial Driver's License (CDL) A CDL is required to drive any of the following vehicles: Any combination of vehicles with a gross combined weight rating (GCWR) of 26,001 or more pounds, providing the gross vehicle weight rating (GVWR) of the vehicle being towed is in excess of 10,000 pounds.
Vehicles that require a Class A CDL typically include semi-trucks. Class B CDL Vehicles that require a class B CDL are single vehicles with a maximum GVWR of 26,000 pounds and are not towing trailers in excess of 10,000 lbs. Class B CDL vehicles commonly include dump trucks, fire trucks and garbage trucks.