Dolly Pentreath

Dolly Pentreath, or Dorothy Pentreath (baptised 1692, died December 1777) was probably the last fluent native speaker of the Cornish language, prior to its revival in 1904 and the subsequent small number of children brought up as bilingual native speakers of revived Cornish.

She is often stated to have been the last monoglot speaker of the language, that is, the last person who spoke only Cornish and not English, but this is contradicted by her own account of herself, as recorded by Daines Barrington.