Siegbahn is a surname. Notable people with the surname include: Bo Siegbahn (1915–2008), Swedish diplomat Kai Siegbahn (1918–2007), Swedish physicist, Nobel Prize in 1981 Manne Siegbahn (1886–1978), Swedish physicist, Nobel Prize in 1924 See also Siegbahn notation, spectroscopic notation for x-ray lines introduced by Manne Siegbahn X unit, unit of length defined by Manne Siegbahn