ollen
Ollen is a proper noun that may refer to more than one topic, and there is no single, widely recognized subject by this name. In reference works it most often appears as a surname or as a toponym (place name) in Germanic-language regions.
As a surname, Ollen is generally understood to be of Germanic origin. Surnames of this type are
As a toponym, Ollen can designate geographic features or settlements in German-speaking areas. Such place names
Other uses of the term may occur in literature, branding, or fictional contexts, where Ollen is chosen
See also: Olen, Olsen, Olle, Ollenhauer. If you have a particular sense of Ollen in mind, providing