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.
So accordingly. 1  some crouching positions are squats. 2  some crouching positions may not be squats. 3  squatting is not implicity crouching.  squatting and crouching are terms with different but overlapping definitions, the former more specific to posture, the latter to 1  motivation. squat is not a synonym for crouch.
A squat is a compound, whole-body exercise that targets the muscles in your lower body and back. If performed correctly, squats help prevent injuries, enhance sports performance, promote mobility, improve balance and strengthen bones that are at risk of weakening due to osteoporosis.