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.
Below is a basic breakdown of the difference between the three levels. 1  A CDL-A allows you to operate a commercial vehicle with a trailer where the trailer weighs more than 10,000 lbs. and the combined weight of the vehicle and trailer exceeds 26,001 lbs. when fully loaded.