The Old French first name Henri, from the Germanic Heinric, was introduced to the British Isles following 1066. This, together with its close relation, the Norman-French Hanri, became Middle English Henry. But in the cottages and communities of the common folk, this name usually became Harry.
Harry, like other first names, was then appropriated as a by-name and eventually a hereditary surname. It was found in most parishes, although less prevalent in south-east Cornwall. At the same time, in a process that has become familiar during the making of this list, Harry was beginning to get its <s> in the 1500s and 1600s.
By 1861 the former position had been entirely reversed, with 717 households headed by a Harris and only 114 stubbornly sticking with Harry. In an interesting echo of earlier patterns the more conservative spellings look to have been most favoured in the west, while Harris with an <s> had conquered most of the rest of Cornwall by this point.
Cornish studies resources 
Hello,
you can comment something about Noble surname please.
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Although Noble, deemed to be a nickname, unfortunately wasn’t either numerous or uniquely Cornish enough for inclusion in the book it’s a long-established Cornish surname. In the early 1500s there were two groups with this family name. One was in the west at Landewednack on the Lizard, where we find Roger and John Nobill in 1524, and the other was around Launceston at the other end of Cornwall, where John Nobell was living at Boyton in 1525 and William Nobell at Lawhitton in 1544. The eastern line seems to have died out or almost so by the 18th century but the western Nobles flourished, the surname spreading west into Penwith and north towards Camborne and Gwennap.
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