Invented by R. D. Blackmore for the heroine of his novel Lorna Doone (1869), child captive of the outlawed Doones on Exmoor, who is eventually discovered to be in reality Lady Lorna Dugal, daughter of the Earl of Dugal. Blackmore seems to have derived the name from the Scottish place name Lorn(e) (Gaelic Latharna), a territory in Argyll.
English: from the Old French personal name Humfrey, introduced to Britain by the Normans. This is composed of the Germanic elements hūn ‘bear cub’ + frid, fred ‘peace’. It was borne by a 9th-century saint, bishop of Therouanne, who had a certain following in England among Norman settlers.