Namesakes
Danish Kings and Queens:
1 king
King Magnus the Good 1042-1047 
Icelandic Presidents and Prime Ministers:
1 prime minister
(prime minister) Magnús Guðmundsson 1926
Norwegian Kings and Queens:
7 kings
King Magnus I the Good 1035-1047
King Magnus II 1066-1069
King Magnus III Barefoot 1093-1103
King Magnus IV the Blind 1130-1135
King Magnus V 1161-1184
King Magnus VI the Lawful 1263-1280
King Magnus VII 1319-1355
Notable Actors and Entertainers:
1 actor
Odd-Magnus Williamson 1980-
Notable Athletes:
2 handball, 1 chess, 1 tennis
(handball) Magnus Wislander 1964-
(tennis) Magnus Norman 1976-
(handball) Magnus Jernemyr 1976-
(chess) Magnus Carlsen 1990-
Notable Scientists and Inventors:
1 physician
Emil Kraepelin (a.k.a. Magnus) 1856-1926
Notable Writers:
1 author
Magnus Mills 1954-
Olympic Medalists:
3 silver, 1 bronze/silver/gold
(silver) Magnus Wislander 1992; 1996; 2000 handball
(silver) Magnus Petersson 1996 archery - individual
(bronze/silver/gold) Magnus Moan 2006; 2014 Nordic combined
(silver) Magnus Jernemyr 2012 handball
Other Royalty:
2 princes
Haakon Magnus, Crown Prince of Norway 1973- Norway
Sverre Magnus of Norway 2005- Norway
Saints:
3 saints
Saint Magnus ?-273
Saint Magnus of Cyzicus ?-c. 290
Saint Magnus Felix Ennodius 473-521
Swedish Kings and Queens:
4 kings
King Magnus I the Strong 1125-1130
King Magnus II 1160-1161
King Magnus III Ladulas 1275-1290
King Magnus IV 1319-1364