x is the Brazil Nut. https://en.wikipedia.org/wiki/Brazil_nut The Brazil nut tree is the only species in the monotypic genus Bertholletia. … The genus is named after the French chemist Claude Louis Berthollet.
https://en.wikipedia.org/wiki/Claude_Louis_Berthollet Claude Louis Berthollet (9 December 1748 in Talloires, France – 6 November 1822 in Arcueil, France) was a Savoyard-French chemist who became vice president of the French Senate in 1804.[1] He is known for his scientific contributions to theory of chemical equilibria
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https://en.wikipedia.org/wiki/Brazil_nut
The Brazil nut tree is the only species in the monotypic genus Bertholletia. … The genus is named after the French chemist Claude Louis Berthollet.
https://en.wikipedia.org/wiki/Claude_Louis_Berthollet
Claude Louis Berthollet (9 December 1748 in Talloires, France – 6 November 1822 in Arcueil, France) was a Savoyard-French chemist who became vice president of the French Senate in 1804.[1] He is known for his scientific contributions to theory of chemical equilibria