Giselher, Gisilher, Gisiler, or Giseler (Latin: Gislaharius) is a Germanic masculine given name. It may refer to:

• Giselher of Burgundy, Burgundian king
• Gisilher (archbishop of Magdeburg) (died 1004), German ecclesiastic
• Giselher Klebe (1925–2009), German composer
• Giselher Schubert (born 1944), German musicologist
• Giselher Wilke (1922–2007), German army officer
• Giselher Wirsing (1907–1975), right-wing German journalist, author, and foreign policy expert

• Gislhere (died circa 785), English Bishop of Selsey
• Jan Jerzy Gisiler, 18th century Polish military officer

This page or section lists people that share the same given name.
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