Complex sentence: He was a Kansas City businessman who purchased the area which was known by Native Americans in the area as "ha ha tonka" which supposedly means "laughing waters," alluding to the springs below the castle.
Split into simpler sentences: He was a Kansas City businessman who purchased the area. It was known by Native Americans in the area as "ha ha tonka," said to mean "laughing waters," alluding to the springs below the castle.