"Sultan" is a title given to king-rank Muslim rulers.
"Sultan" is also a possible first name for Maghrebi Arabs.
Turkish dynasties take their name from the first name of the founder of the dynasty.
All Islamic nations take their name from the dynasty name of their founder.
Started playing as a Maghrebi Arab named Sultan, culture shifted to Turkish. Got my father to disown me, am now lowborn. Fled to the court of the Abbasid Caliph, and befriended him. Formed a new dynasty: the Sultan dynasty. Assassinated the heirless governor of Syria, the Caliph makes me the new governor. I raised an army and declared my independance. My new nation takes my dynasty name.
I am now Sultan of Sultan, Sultan of the Sultan Sultanate.