What does the surname Dack mean?

"Recorded in a number of spelling forms including Dach, Dachs, Taks (German), Das (Dutch and Flemish) and Dack, Dax, and Tax, an Anglo-Saxon form of the original pre 7th century German. However spelt this is a surname of early medieval origins, and almost certainly derives from the Word 'dachs' meaning a badger. As such it formerly described somebody known for their nocturnal habits (!), or one who had the unusual physical feature of a streak of white or fair hair among the black."

My surname is Dack.