I said Minnie Driver is a "reference" when it comes to square jawed type, because she is universally recognized as a square jawed woman. If you ask people to quote some square jawed women names.... She will often come as part of the lot.

Here jaw is really angular from the frontal view, but not as much as expected from the side view... this can happen when the jaw is very muscular.

B+ grade chin, A- jaw angle with a flat jawline!