The Sereer of Gambia, numbering approximately 66,500 people, are Engaged yet Unreached. They are a matrilineal people whose ancestors fled forced Islamization in 11th-century Takrur to found the Sine and Saloum kingdoms, ruled by kings titled Maad a Sinig and Maad Saloum, resisting further Islamization through the 19th-century jihad era. They mostly adhere to Folk Islam and Serer is their primary language.