Juan José Elhuyar, Spanish chemist and mineralogist (died 1796)

Juan José Elhuyar Lubize was a Spanish chemist and mineralogist, who was best known for being first to isolate tungsten with his brother Fausto Elhuyar in 1783.

June 15 is the 166th day of the year in the Gregorian calendar; 199 days remain until the end of the year.