1) John's wife Sarah would have been the SISTER of Kaneahintwaghte, and Catherine would have been his neice. The original excerpt from The Journal of Major John Norton is as follows (p. 5):
"On the 27th of April 1809, about noon, we took our departure from home, descending the Grand River in a canoe. The waters were increased by the melting of the snow near its source, at the same time that the lands along its banks were assuming the verdant garb of spring with all its cheering accompaniments: Bidding adieu to our friends at the villages we passed, we proceeded until we reached Dochsteders, having advanced about twenty miles.
"Here we stopped for the evening. The house belonged to a half Onondaga, the daughter of the person whose name it bears. To this place the river is navigable from Lake Erie (ten miles distant), for vessels drawing eight or twelve feet water. Her Uncle Kaneahintwaghte, an Onondaga Chief, being there, we passed the evening in conversation until late when we retired to rest. In the morning we proceeded. My companions consisted of two Onondagas (a Chief and his son), and a young man of the Mohawk or Kanyenkahaga dialect."
"The house belonged to a half Onondaga, the daughter of [John Dochsteder]" - which would be Catherine, Catherine's uncle being Kaneahintwaghte.
2) Catherine would have married Oliver when LYMAN Burnham died, rather than Chauncey (although that is somewhat obvious...)