Siegbahn was one of four father-son pairs to win the physics Nobel. His father, Karl Manne George Siegbahn, won it in 1924 for his studies of X-ray spectroscopy.

1)Kai Manne Börje, schwedischer Physiker, Sohn von Karl Manne Georg Siegbahn, *20.4.1918 Lund; ab 1951 Professor in Stockholm, ab 1954 in Uppsala; bedeutende Arbeiten zur Untersuchung des ...