Margaret Thatcher (Joan of What?)

Dame Joanne Keeling Seinfeld, LS CG PC FISR (née Keeling; born 9 August 1946) is a Cygnian stateswoman and politician who served four terms as the 26th Chancellor of Cygnia from 1983 to 1999. Having held the office for 16 years, she was the longest-serving Chancellor in Cygnian history, and was the first woman to hold the Chancellorship.