What was the name of Esso's "Tiger in the Tank"?

The tiger associated with Standard Oil/Exxon is nameless. Tony the Tiger belongs to Kellogg.
The name of Standard Oil's ad campaign is "put a tiger in your tank."

kgbanswers.com/what-is-the-name-of-the-tiger-mascot-for-esso-gas/10872415 webpage no longer exists

Apart from the lawsuit, the history of the Esso tiger (and Tony) are given on this site and no name seems to have been given to it.
http://petcaretips.net/famous_cats_tony_tiger.html

The cartoon tiger had no name but in the 70s Exxon started several campaigns using real tigers for commercials and billboards. The two most prominent tigers were called Tessa and Tango. Tessa spent most of her life in a commercial centre on Aruba where she was photographed with paying shopgoers. Tessa died at the age of 14.
https://bb.visitaruba.com/f2/deep-regret-963/

Tango died at the age of 22 in Woodside Wildlife Park in Lincolnshire, UK.
https://www.dailymail.co.uk/news/article-3784388/It-s-end-road-Esso-advert-tiger-Tango-surviving-big-cat-classic-fuel-commercial-dies-22.html

For those who understand German, here's a site "The Esso Tiger is dead":
http://www.tigerfreund.de/4/der_essotiger_ist_tot.htm