Rubuta ci gaba don wannan sakin layi - An yi masa baftisma a St Benet's a London, shi ɗan Robert Dormer ne, 1st Earl na Carnarvon da Lady Anna Sophia Herbert, 'yar Philip Herbert, 4th Earl na Pembroke. Dormer ya sami ilimi a Jami'ar Oxford, inda ya kammala karatun digiri na biyu a shekara ta 1648. A 1643, a kan mutuwar mahaifinsa a yakin farko na Newbury
ya yi nasara a kan mahaifinsa sunayen sarauta kuma ya zama Hereditary Chief Avenor da Keeper na Sarki Hawks. Mahaifiyarsa ta rasu 'yan watanni da suka shige.