William married Arminta Jane Fillmore 24 Dec 1876, Lumsden, , New Brunswick, Canada. Arminta (daughter of John Fillmore and Elizabeth J Tingley) was born 22 Aug 1856, Little Ridge, , New Brunswick, Canada; died 20 Aug 1940, Denver, , Colorado, United States; was buried , Waterside Cemetery, Waterside, , New Brunswick, Canada. [Group Sheet]

1. Frances Bertha Hoar was born 30 Nov 1877, , Albert, New Brunswick, Canada; died 25 Mar 1958.
2. Arthur William Hoar was born 26 Mar 1879, , Albert, New Brunswick, Canada; died 11 Apr 1893.
3. Spurgeon Starratt Hoar was born 28 Oct 1883, , Albert, New Brunswick, Canada; died 14 Apr 1947, Oakland, , Maine, United States; was buried , Lake View Cemetery, Oakland, , Maine, United States.
4. Sara Ethel Hoar was born 21 Nov 1885, Waterside, Albert, New Brunswick, Canada; died 20 Aug 1966, Gilroy, , California, United States; was buried , Oak Hill Memorial Park, San Jose, , California, United States.
5. Clara Maude Hoar was born 19 Nov 1887, Waterside, , New Brunswick, Canada; died 19 Dec 1891.
6. Henry Melvin Stanley Hoar was born 11 Oct 1889, Waterside, Albert, New Brunswick, Canada; died 20 Mar 1974; was buried , Forest City Cemetery, Portland, , Maine, United States.
7. Clarence Victor Hoar was born 16 Jan 1892, Waterside, , New Brunswick, Canada; died 2 Mar 1919.
8. Edith Arminta Hoar was born 14 Jul 1894, Waterside, Albert, New Brunswick, Canada; died Yes, date unknown.
9. Henrietta Elizabeth Hoar was born 1 Oct 1897, Waterside, , New Brunswick, Canada; died 5 Jan 1899.