William TeSelle was born in Firth, Lancaster County, Nebraska on 23 September 1871. His parents were Harmen Jan te Selle (1844-1919) and Berendina Aleida Reusink (1841-1876). He married Clara J. Bade (1875-1964) on 10 March 1896. William died on 28 February 1936.
William and Clara Bade TeSelle had eight children from their marriage:
- Gladys V. TeSelle (1897–1982) [Spouse: Gerrit TeKolste (1896–1972)]
- Herman J. TeSelle (1898–1964) [Spouse: Gladys Chew Evans (1904–1996)]
- Maria Gusta TeSelle (1900–1996) [Spouse: Henry J. Kallemeyn (1878–1973)]
- Mabel Edith TeSelle (1902–1975) [Spouse: Arnelton Zweerink]
- Clarence TeSelle (1903–1969) [Spouse: Mary McKay (1909–1985)]
- Annie Mildred TeSelle (1905–1983) [Spouse: Henry Hartwig (1900–1984)]
- Delmar Richard TeSelle (1906–1996) [Spouse: Lois Murine Hocking (1916–1996)]
- Berniece Eloise TeSelle (1913–1988) [Spouse: Lee Raymond Burling (1913–1957)]
