Sue was the fourth of twelve children born to:
John Nicolas Knaff, b. Jun. 24, 1851 in Belgium, Ozaukee, WI. and d. Sep. 1, 1925 in Belgium, Ozaukee, WI &
Mary Theresa Tholl, b. Nov. 18, 1858 in Belgium, Ozaukee, WI. and d. Jan. 14, 1932 in Lake Church, Ozaukee, WI.

John and Mary's children were:
1) Catherine "Kate" Knaff, b. 1877 and d. 1960. Catherine marr. Jacob Ries.
2) Henry Knaff, Aug. 28, 1879 in Lake Church, Ozaukee County, WI. and d. Jun. 16, 1978 in Cedarburg, Ozaukee County, WI. Henry marr. Elfrieda Edith Spoor.
3) Anna Emalia Knaff, b. Sep. 1, 1883 in Lake Church, Ozaukee County, WI. and d. Mar. 21, 1954 in Westmont, DuPage County, IL. Anna marr. Francis Marion James.
4) Susan Margaret "Sue" Knaff, b. Feb. 25, 1886 in Belgium, Ozaukee county, WI. and d. Nov. 6, 1981 in Sierra Madre, Los Angeles county, CA. Sue marr. Fred Hertwick Schwend.
5) Margaret "Maggie" Knaff, b. Aug. 16 1887 in Lake Church, Ozaukee County, WI. and d. Jan. 17, 1983 in Chicago, Cook County, IL. Maggies marr. Fred Ray.
6) Emma Knaff, b. Nov. 1, 1889 in Lake Church, Ozaukee county, WI. and d. Mar. 14, 1983 in Port Washington, Ozaukee county, WI.
7) Aloysius Henry "Aloys" Knaff, b. 1891 in Belgium, Ozaukee County, WI. and d. Nov. 21, 1977 in MI.
8) Frank Knaff, b. Oct. 11, 1893 and d. Jan. 1, 1968.
9) Leo J. Knaff, b. Aug. 7, 1895 in Belgium, Ozaukee County, WI. and d. Jan. 14, 1979 in Hinsdale, DuPage County, IL. Leo marr. Josephine Mary Mueller.
10) Elenora A. "Eleanore" Knaff, 1897 – 1972
11) Clement James "Sam" Knaff, b. Feb. 12, 1901 in Belgium, Ozaukee County, WI. and d. Oct. 31, 1945 in WI. Clement marr. Alfreda Mayer in 1926 and she died in 1927. He marr. 2nd, Gladys Josephine McCarthy.
12) Henrietta "Detzy" Knaff, b. Feb. 12, 1901 in Belgium, Ozaukee County, WI. and d. May 18, 1990 in Ozaukee County, WI.