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Cognomen Harmannus (Harmannus ) , globally, is a very rare last name. The surname Harmannus is habitual in Hungary, where it is a very rare surname, Netherlands, and Spain, where it is an extremely rare surname. More prevalently, Harmannus is the forename as well as the last name.
Hut, Gomarus, Harkema, Heikens, Hofstee, Hutting, Meinders, Speelman, Bijmolt, Canninga, Groenier, Van Raden, Vrielink, Steenhuis, Noordhuis, Vandermolen, Van Der Wal, Reintsema, Van Der Krieke, Bottema, Stavast, Smit, Dijk, Noot, Molen, Kooij, Kuper, Poort, Spekman, Schuur, Kruyer, Dejong, Louwes, Timmer, Venema, Velvis, Müller, Bakker, and Van Der Molen