Namesakes
Notable Actors and Entertainers:
1 actor
Uta Hagen (a.k.a. Thyra) 1919-2004 
Other Royalty:
3 princesses, 1 princess/queen consort
Thyra of Denmark; Thyra, Crown Princess of Hanover 1853-1878; 1878-1933 Denmark; Hanover
Märtha of Sweden (a.k.a. Thyra) 1901-1954; 1929-1954 Sweden; Norway
Astrid of Sweden (a.k.a. Thyra) 1905-1935; 1934-1935 Sweden; Belgium
Cecilie of Prussia (a.k.a. Thyra) 1917-1975 Prussia