Namesakes
Nobel Prize Winners:
1 chemistry, 1 physics
(chemistry) Walther Nernst 1920 
(physics) Walther Bothe 1954
Notable Scientists and Inventors:
1 chemist, 1 physicist
Walther Nernst 1864-1941
Walther Bothe 1891-1957
Other Royalty:
1 prince
Gabriel of Sweden (a.k.a. Walther) 2017- Sweden
Swiss Presidents:
1 president
Walther Stampfli 1944