Seyni is a name. Notable people with the name include: Given name Seyni Garba, Nigerien army general Seyni Kountché (1931–1987), Nigerien military officer and president Seyni N'Diaye (born 1973), Senegalese football player Seyni Oumarou (born 1951), Nigerien politician Surname Aminatou Seyni (born 1996), Nigerien sprinter