What is "graebner"

Graebner or Gräbner is a German surname. Notable people with the surname include:

• Carole Caldwell Graebner, (1943–2008), American tennis player
• Clark Graebner, (born 1943), American tennis player
• Fritz Graebner, (1877–1934), German ethnologist
• Viktor Eberhard Gräbner (1914–1944), German SS officer