Question: What nation located farthest to the west within the Six Nations has a town named informally for a prominent  woman, Catherine Montour?

Context paragraphs:
Walker Mohawk First Nation: The Walker Mohawk First Nation is a Mohawk First Nation in southern Ontario, and is a member nation of the Six Nations of the Grand River.  Its reserves include the shared reserves of Glebe Farm 40B and the Six Nations of the Grand River First Nation.

Upper Cayuga First Nation: The Upper Cayuga First Nation is a Cayuga First Nation in southern Ontario, and a member nation of the Six Nations of the Grand River.  Its reserves include the shared reserves of Glebe Farm 40B and the Six Nations of the Grand River First Nation.

Catharine, New York: Catharine is a town in Schuyler County, New York.  The population was 1,930 at the 2000 census.  The town is one of two in the county named after Catherine Montour, a Native American interpreter and leader in the area.  The Town of Catharine is in the southeast part of the county and is north of Elmira, New York.

Upper Mohawk First Nation: The Upper Mohawk First Nation is a Mohawk First Nation in southern Ontario, and is a member nation of the Six Nations of the Grand River.  Its reserves include the shared reserves of Glebe Farm 40B and the Six Nations of the Grand River First Nation.

Catherine's Town: Catherine's Town was a Seneca village, ("Queanettquaga," or "Sheoquago") named informally for a prominent Seneca woman, Catherine Montour.  It was located at the south end of Seneca Lake, near present-day Watkins Glen (and the towns of Catharine, Montour, and Montour Falls, all named for Catherine Montour) in what is now Schuyler County, New York.

Ken Montour: Ken Montour (born September 9, 1979 in Six Nations of the Grand River First Nation) is a former professional box lacrosse player in the National Lacrosse League.  Montour played 8 seasons in the NLL, most of them with the Buffalo Bandits.

Catherine Montour: Catherine Montour, also known as Queen Catherine (died after 1791), was a prominent Iroquois leader living in "Queanettquaga," a Seneca village of "Sheaquaga", informally called Catharine's Town, in western New York.  She has often been confused with Elizabeth "Madame" Montour, her aunt or grandmother who was a noted interpreter and adviser to the governor, and with "Queen Esther" Montour, usually described as her sister.  Several places in western New York were later named in her honor, after most of the Iroquois had been forced to cede their lands and were driven out of the region.

Tuscarora First Nation: Tuscarora First Nation is a Tuscarora First Nation in southern Ontario, and is a member nation of the Six Nations of the Grand River.  Its reserves include Glebe Farm 40B and the Six Nations of the Grand River First Nation.

Seneca people: The Seneca are a group of indigenous Iroquoian-speaking people native to North America who historically lived south of Lake Ontario.  They were the nation located farthest to the west within the Six Nations or Iroquois League (Haudenosaunee) in New York before the American Revolution.

Montour, New York: Montour is a town in Schuyler County, New York, United States.  The population was 2,446 at the 2000 census.  The town is one of two towns in the county named after Catherine Montour.

Supporting paragraphs: Catherine's Town Seneca people
Answer: The Seneca