Ada Coleman was head bartender at the American Bar at the Savoy Hotel in London in the early 20th century. She created a cocktail that is still served today, and she's an enduring icon of the bartending industry.
Research:

E. Virgil Neal: Hypnotist, Fraudster, Tycoon, Part 2
41:22

E. Virgil Neal: Hypnotist, Fraudster, Tycoon - Part 1
35:28

SYMHC Classics: Mancini Sisters
42:22