The geologist Ignacy Domeyko died at the age of 86. Here is all you want to know, and more!
Biography - A Short Wiki
Polish geologist and meteorologist who contributed to mining technology and introduced Latin America to the metric system. Many things have been named in his honor, including the mineral domeykite, the shellfish, Nautilus domeykus, and the asteroid 2784 Domeyko.
His father was a Polish-speaking Lithuanian nobleman.