Portuguese-based creole languages used to distinguish locally born black people of African descent from those who had been brought from Africa as slaves. In time, however, this generic sense was lost, and the word "crioulo" or its derivatives (like "Creole" and its equivalents in other languages) became the name of several specific Upper Guinean communities and their languages: the Guinean people and their Kriol language, Cape Verdean people and their Kriolu language, all of which still today have very vigorous use, suppressing the importance of official standard Portuguese. The oldest Portuguese-based creole are the so-called "crioulos" of Upper Guinea, born around the Portuguese
Etymology of London derived from the Indo-European roots "*plew-" "to flow, swim; boat" and "*nejd-" "to flow", found in various river names around Europe. Coates does admit that compound names are comparatively rare for rivers in the Indo-European area, but they are not entirely unknown. Lacey Wallace describes the derivation as "somewhat tenuous". The Museum of London is more positive, stating on its web site "philologists now equate the name with the Indo-European word 'plowonida', meaning 'fast-flowing river' and referring to the Thames". The display on Roman London in the museum state the etymology as fact. The earliest account of the toponym's derivation