Julius Backen, Mathilda Backen, Catherine Davids, and Fred Davids.

The shorter lady is Mathilda Backen, known as Anna. The taller lady is Catherine, known as Tante Tina. -Julius and Catherine are siblings (along with George). The car belonged to Julius Backen.

Pictures courtesy of Sandy (Backen) Barton from the collection of her Aunt Mildred.