William Lansdowne, Sr., better known as Bill Lansdowne, English former professional footballer who played for West Ham United
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William Petty, 2nd Earl of Shelburne and 1st Marquess of Lansdowne, British Prime Minister between 1782 and 1783.
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William Lansdowne, Jr., better known as Billy Lansdowne, English former professional footballer who played for West Ham United, Charlton Athletic, Gillingham and Kalmar
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