Given names often turned into family names when people were identified by their father's name. For example, the first name Ahrend developed into the family name Ahrends by adding a genitive s-ending, as in Ahrend's son. Examples: Ahrends, Burkhard, Wulff, Friedrich, Benz.
OK the definition you have used for crouching associates it with stooping (which on Wikipedia redirects to bowing. Squatting essentially involves bending at the knees and hips. If there is any bending at the waist (and maybe lowering of the head) then that is considered stooping.
The hack squat is an exercise in which a person picks up a barbell from the floor behind his or her back and squats.This exercise arrives at its name from the German word hacke, which means ankle. In a traditional hack squat, the barbell sits behind the ankles before being lifted.he hack squat is an exercise in which a person picks up a barbell from the floor behind his or her back and squats.