Robert Hampden-Trevor, 1st Viscount Hampden British diplomat (1706-1783) (1706–1783) Parents Anne Weldon Bernard Thomas Trevor, 1st Baron Trevor Children Constantia Hampden-Trevor John Hampden-Trevor, 3rd Viscount Hampden Mary Constantia Hamden-Trevor Thomas Hampden Anne Hampden-Trevor Siblings Sir John Bernard, 4th Bt. Edward Trevor Richard Trevor John Trevor, 3rd Baron Trevor Thomas Trevor, 2nd Baron Trevor of Bromham Partners Constantia de Huybert