Usener, Hermann (1834-1905)(11)
Unger, Hellmuth (1891-1953)(6)
Usinger, Rudolf (1835-1874)(5)
Hillebrandt, Alfred (1853-1927)(4)
J. C. Hinrichs'sche Buchhandlung (1819-1944)(3)
J.C.B. Mohr (Paul Siebeck) (1899-2005)(3)
Uhlmann-Bixterheide, Wilhelm (1872-1936)(3)
Vaihinger, Hans (1852-1933)(3)
Vandenhoeck & Ruprecht (1735-)(3)