sentences:  While it is unknown when the migration occurred, it is believed that the Gurunsi were present in their current location by 1100 AD.Following the 15th century, when the Mossi states were established to the north, Mossi horsemen often raided Gurunsi areas for slaves, but the Gurunsi peoples were never fully subjugated, remaining independent.According to doctor Salif Titamba Lankoande, in "Noms de famille (Patronymes) au Burkina Faso", the name Gurunsi comes from the Djerma language of Niger words “Guru-si”, which means “iron does not penetrate”.