Anna Petre (1716–1760) of the ‘Petre family (1716–1760) Parents James Radclyffe, 3rd Earl of Derwentwater Anna Maria Webb Children Robert Petre, 9th Baron Petre Barbara Petre Juliana Petre Katherine Petre Siblings John Radclyffe, Viscount Radclyffe Partners Robert Petre, 8th Baron Petre
