Idonia de Clifford -1365 (1300–1365) Parents Maud de Clare Robert de Clifford, 1st Baron de Clifford Children Alianore de Percy Richard de Percy Isabel de Percy Maud Percy Thomas Percy Robert de Percy Roger de Percy Henry de Percy, 3rd Baron Percy William de Percy Margaret de Percy Siblings Roger de Clifford, 2nd Baron de Clifford Robert de Clifford, 3rd Baron de Clifford Partners Henry de Percy, 2nd Baron Percy