Orthography
In older French publications the spelling "Ouolof" is often used instead of "Wolof". In some English publications, predominantly those referring to Gambian Wolof, the spelling "Wollof" is used, because this spelling will induce native English speakers to pronounce the term correctly as a Wolof speaker. In publications of the 19th century and before the spelling "Volof" and "Olof" can also be found. Rarely used are also the spellings "Jolof", "Jollof" and "Dyolof". - The term "Wolof" itself may also refer to the Wolof language or to things originating from Wolof culture or tradition.
It is thought the Wolof people originated from a Baffouri population in the Sahara before it became hostile to farming due to desertification. As the environment deteriorated some of them drifted into the Senegalese areas of Futa Toro and modern-day south eastern Mauritania. With the Arab conquests of around 640 AD they were forced to move into north and east Senegal where over time villages developed into autonomous states such as Baol, Kayor, Saloum, Dimar, Walo and Sine the overall ruling state being that of Jolof who came together voluntarily to form the Jolof Empire.
Legend has it that in Walo the fishermen from several villages argued vehemently over firewood which lay along the edge of a lake at Mengen. Just before matters developed into violence a mysterious person called Ndyadyane Ndyaye (Njanjan Njie) arose from the lake and shared out the firewood fairly among the men and promptly vanished much to their bafflement. The decision was made to try and catch him so they feigned another argument and when he appeared he was caught. When Mansa Wali Jon the ruler of Sine, who was himself endowed with supernatural powers, heard about the strange goings on in Mengen he shouted "Ndyadyane Ndyaye" which is an expression of utter amazement. This name was given to the strange visitor (actual name: Amadu Bubakar Ibn Muhammed). He became the first ruler of the new empire with the title Burba Jolof and other states voluntarily pledged allegiance to him.
Read more about this topic: Wolof People