What is associated with: a kingdom of west central africa founded around 1390 is called this like 2 current countries but spelled with a k?

Based on the clue 'a king by the name of crocus was a leader of the a...', what is the answer? Based on the clue 'a king described nepal as a yam between two boulde...', what is the answer? Based on the clue 'a king named duncan is killed', what is the answer? What is associated with: a king of this name rebuilt oslo in the 1600s for a while the city was named after him? Based on the clue 'a kings headgear or a tooth cover', what is the answer? Based on the clue 'a kip is a deadweight load equivalent to this many...', what is the answer? Based on the clue 'a kir is white wine creme de cassis a kir royale ...', what is the answer? Based on the clue 'a kitchen tool or a policemans nickname that like ...', what is the answer?