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| Contemporary Notables of the name Loys (post 1700) | + |
- Jean-Philippe Loys de Cheseaux (1718-1751), Swiss astronomer from Lausanne in Switzerland
- Louis François Fernand Hector de Loys (1892-1935), Swiss oil geologist, best known for the claim that he discovered a previously unknown primate, De Loys's ape, during a 1920 oil survey expedition in Venezuela, but it is now thought to have been a spider monkey
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