Thundercat (Earth-8999)

"Thundercat" is Peter Griffin's former Saudi second wife, which he named so because he couldn't understand Arabic.

History
After the Griffin family moved to Saudi Arabia after Peter lost his job at the Pawtucket Brewery in Quahog, he sought to become a good Saudi citizen, and soon started to adopt all local customs, including converting to Islam and having more than one wife; this is where he found Thundercat, which he named so because that's what he understood when talking to her.

Peter started to value Thundercat much more than Francine, because she did basically all he asked her for, including entering in cat fights against Francine for his amusement. He liked her so much he created a scoring point for his wives to see who made him happier.

When the Griffins left Saudi Arabia to go back to the United States after Peter's boss Avery Bullock allowed him back in, Peter left Thundercat.