Namesakes
Danish Kings and Queens:
4 kings
King Knud III the Hardy (a.k.a. Knut) 1035-1042 
King Knud IV the Holy (a.k.a. Knut) 1080-1086
King Knud V Magnussen (a.k.a. Knut) 1146-1157
King Knud VI (a.k.a. Knut) 1182-1202
King Harthacnut (a.k.a. Knut) 1040-1042
Nobel Prize Winners:
1 literature
(literature) Knut Hamsun 1920
Norwegian Kings and Queens:
1 king
King Knut the Great 1028-1035
Notable Writers:
1 author
Knut Hamsun 1859-1952
Olympic Medalists:
2 silver, 1 gold
(silver) Knut Lindberg 1912 4x100 m relay
(silver) Bertil Linde (middle name Knut) 1928 ice hockey
(gold) Henry Eriksson (a.k.a. Knut) 1948 1500 m
Saints:
1 saint
Saint Canute IV of Denmark (a.k.a. Knut) 1040-1086
Swedish Kings and Queens:
2 kings
King Knut I 1167-1196
King Knut II the Long 1229-1234
Swedish Prime Ministers:
1 prime minister
Hjalmar Hammarskjöld (a.k.a. Knut) 1914-1917