In popular use, soffit most often refers to the material forming a ceiling from the top of an exterior house wall to the outer edge of the roof, i.e., bridging the gap between a home's siding and the roofline, otherwise known as the eaves.
So it's basically Dark Father. (Rolling Stone, June 2, 2005). Vader is the Dutch word for father (the Dutch word is instead pronounced fah-der), and the German word for father (Vater) is similar. However, in the earliest scripts for Star Wars, the name Darth Vader was given to a human Imperial general.
Three suffixes which often indicate a German occupational name are: -er (one who), commonly found in names such as Fischer, one who fishes; -hauer (hewer or cutter), used in names such as Baumhauer, tree chopper; and -macher (one who makes), found in names like Schumacher, one who makes shoes.