Thistles were first formed in 2019 to compete in the Women's T20 Super League, a tournament designed to provide more competitive cricket to the best players in South Africa.
[6] Duchesses won two of their three matches in the tournament, and finished second, just edged out by winners Coronations on Net Run Rate.
[7] Thistles bowler Nobulumko Baneti was the leading wicket-taker in the tournament, with 7 wickets including a best of 4/18, taken in the side's 36 run victory over Duchesses.
[8][9] The tournament returned for its fourth edition in December 2022, with Andrie Steyn becoming the side's captain and Yolandi van der Westhuizen becoming coach.
[1] The side finished third in the tournament standings, although with five matches abandoned due to rain, no overall winner was crowned.