Let’s start with Levi-Civita. The Levi-Civita symbol is named after the Italian mathematician Tullio Levi-Civita, who lived from 1873 to 1941. When Einstein was asked what he likes best about Italy, he replied spaghetti and Levi-Civita.
The Remarkable Relationship between the Levi-Civita Symbol and the Kronecker Delta | Deep Dive Maths