Asperen

Etymology
First attested as asperen in 893. Etymology. One proposed etymology interprets the name as a derivation from a hydronym in turn derived from with the suffix. Hydronyms are rarely derived from tree names, however. It is more likely that the toponym is derived from an older hydronym 🇨🇬, which might in turn be derived from. Compare, and.

Etymology
Definite form; from, an ia-derivation of.