Cornish Americans (Cornish: Amerikanyon gernewek) are Americans who describe themselves as having Cornish ancestry, an ethnic group of Brittonic Celts native to Cornwall and the Scilly Isles, part of England in the United Kingdom. Although Cornish ancestry is not recognized on the United States Census, Bernard Deacon at the Institute of Cornish Studies estimates there are close to two million people of Cornish descent in the U.S., compared to half a million in Cornwall itself and only half of those Cornish by descent.