A great grammarian of Sanskrit, Pāṇini, lived sometime around the 6th to the 4th century BCE. Pāṇini is often considered to be the first great descriptive linguist.
The name Pāṇini is not to be confused with name of the Italian sandwiches known as panini. https://languagemiscellany.com/2022/06/paninis-apostrophes/
According to a comment made by a user on a post on Language Log, the pun on the grammarian’s name and panini appeared in the name of an Italian-style sandwich shop in Berkeley, co-owned by a Sanskritist, Jeffrey Mousaieff Masson. Language Log » “In Pāṇini We Trust” (upenn.edu)