Question: What Christian groups belonging to the church communities of Anabaptist denominations named after Menno Simons, did a Canadian novelist and short story writer write of?

Context paragraphs:
Adam Pastor: Adam Pastor was born Roelof Martens or Martin, at Dörpen, Westphalia, and was a Catholic priest at Aschendorf till 1533 when he joined the peaceful wing of the Anabaptists.  At the Anabaptist conference in Goch in 1547, at which Menno Simons was chairman, Pastor was censured for his anti-Trinitarian views, and then in Lübeck in 1552 he and Simons held a debate on the deity of Christ and the Trinity.

Mennonite: The Mennonites are Christian groups belonging to the church communities of Anabaptist denominations named after Menno Simons (1496–1561) of Friesland (which today is a province of the Netherlands).  Through his writings, Simons articulated and formalized the teachings of earlier Swiss founders.  The early teachings of the Mennonites were founded on the belief in both the mission and ministry of Jesus, which the original Anabaptist followers held to with great conviction despite persecution by the various Roman Catholic and Protestant states.  Rather than fight, the majority of these followers survived by fleeing to neighboring states where ruling families were tolerant of their radical belief in believer's baptism.  Over the years, Mennonites have become known as one of the historic peace churches because of their commitment to pacifism.

Menno Simons College: Menno Simons College is a Mennonite college in Winnipeg, Manitoba, Canada.  It is a college of Canadian Mennonite University (CMU) and is one of CMU's three founding colleges.  Menno Simons College, located in downtown Winnipeg, is affiliated with the University of Winnipeg.

Guy Vanderhaeghe: Guy Clarence Vanderhaeghe, OC, SOM (born April 5, 1951) is a Canadian novelist and short story writer, best known for his Western novels trilogy, "The Englishman's Boy", "The Last Crossing", and "A Good Man" set in the 19th-century American and Canadian West.  Vanderhaeghe has won three Governor General's Awards for his fiction, one for his short story collection "Man Descending" in 1982, the second for his novel "The Englishman's Boy" in 1996, and the third for his short story collection "Daddy Lenin and Other Stories" in 2015.

Dirk Philips: Dirk Philips (1504–1568) was an early Anabaptist writer and theologian.  He was one of the peaceful disciples of Melchior Hoffman and later joined Menno Simons in laying out practical doctrines for what would become the Mennonite church.

Witmarsum, Netherlands: It is the birthplace of the Anabaptist leader Menno Simons (1496–1561).  There are two windmills in the village, De Onderneming and De Pankoekstermolen.

Menno Simons: Menno Simons (1496 – January, 31 1561) was a former Catholic priest from the Friesland region of the Low Countries who became an influential Anabaptist religious leader.  Simons was a contemporary of the Protestant Reformers and it is from his name that his followers became known as Mennonites.

Sandra Birdsell: Sandra Louise Birdsell, CM (née Bartlette) (born 22 April 1942) is a Canadian novelist and short story writer of Métis and Mennonite heritage.

Plain people: Plain people are Christian groups characterized by separation from the world and by simple living, including plain dressing.  Many Plain people have an Anabaptist background with the exception of the Old German Baptist Brethren and Old Order River Brethren.  These denominations are of German, Swiss German or Dutch ancestry.  Conservative Friends are traditional Quakers who are also considered plain people; they come from a variety of different ethnic backgrounds.

Menno Township, Mifflin County, Pennsylvania: Menno Township is a township in Mifflin County, Pennsylvania, United States.  The population was 1,763 at the 2000 census.  The township was named for Menno Simons, an early Mennonite leader.  Mennonites and Amish were among the early settlers of the area, and members of these faiths continue to form a part of the area's population.

Supporting paragraphs: Sandra Birdsell Mennonite
Answer: Mennonites