Herman is mentioned as count of Nassau between 1190 and 1192.[1][2][3] He ruled together with count Walram I of Nassau, his father's cousin.[1][2]
In 1192 Herman became canon of the Saint Peter at Mainz.[1][2] He probably wasn't married and died without offspring.[2]
Sources
This article is translated from the corresponding Dutch Wikipedia article, as of 2018-08-27.
Dek, A.W.E. (1970). Genealogie van het Vorstenhuis Nassau [Genealogy of the Royal House of Nassau] (in Dutch). Zaltbommel: Europese Bibliotheek. OCLC27365371.
Hesselfelt, H.F.J. (1965). "De oudste generaties van het Huis Nassau" [The oldest generations of the House of Nassau]. De Nederlandsche Leeuw, Maandblad van het Koninklijk Nederlandsch Genootschap voor Geslacht- en Wapenkunde [The Dutch Lion, Monthly Journal of the Royal Dutch Society for Genealogy and Heraldry] (in Dutch). 1965 (11): 354–365.
Schwennicke, Detlev (1978). Europäische Stammtafeln. Stammtafeln zur Geschichte europäischen Staaten. Neue Folge [European Genealogies. Genealogies from the History of European States. New Series] (in German). Vol. Band I. Marburg: J.A. Stargardt.
Venne, J.M. van de; Stols, Alexander A.M. (1937). Geslachts-Register van het Vorstenhuis Nassau [Genealogy of the Royal House of Nassau] (in Dutch). Maastricht: A.A.M. Stols’ Uitgevers-Maatschappij.
Vorsterman van Oyen, A.A. (1882). Het vorstenhuis Oranje-Nassau. Van de vroegste tijden tot heden [The Royal House of Orange-Nassau. From the earliest days until the present] (in Dutch). Leiden & Utrecht: A.W. Sijthoff & J.L. Beijers.