"George Everest was born on 4 July 1790 but the location is open to doubt. This uncertainty as to his birthplace arises because his father William Tristram Everest had an estate near Crickhowell in South Wales and some reference works suggest he was born there. [...] George's baptismal certificate certainly indicates that he was baptized in Greenwich but although the certificate also bears his date of birth it does not indicate the locality."
Smith, James R. (2015). «Sir George Everest». In Martin, Geoffrey (ed.). Geographers: Biobibliographical Studies, Volume 15. Bloomsbury Publishing.