Harold W. Hennep is not widely recognized in mainstream music history, and there is limited information available about him. He may not be a prominent figure in the music industry or may be known within a niche genre or community. If you are referring to a lesser-known or local artist, it would be helpful to provide more context or specific details. Alternatively, it’s possible that the name may be misspelled or confused with another artist. For more information, please check local music archives or specific regional resources that may cover lesser-known artists. If you have any other artists in mind or need information on a different topic, feel free to ask!