Nanci,
I am not following this tree, but maybe this will help trace down some descendants.
009799-05 Harry HORSLEY, 25, Saw Miller, Stanhope, Guilford, s/o Allan HORSLEY & Agnes McPHAIL, married Ethel May BOICE, 21, Guilford, same, d/o Isaac BOICE & Elizabeth BARYARON. Witn: Ernest & Alma BOICE, both of Stanhope. March 29, 1905, Dysart

005126-96 Samuel George COOPER, 25, Stanhope Tp., Guilford Tp., Farmer, s/o William COOPER & Fanny COOPER married Charlotte Amelia BOICE, 23, Coboconk Somerville Tp., Guilford Tp., d/o Isaac BOICE and Betsy BOICE. Wtn: Frederick BOICE of Guilford Tp. and Alma J. COOPER of Stanhope Tp. on June 24, 1896 at Guilford Tp.

9810-06 Alexander Ernest BOICE, 28, farmer, Coboconk, Guilford twp., s/o Isaac BOICE & Elizabeth BARGARS, married Maud JONES, 18, Stanhope twp., same, d/o Henry JONES, farmer, & Jane TAYLOR, witn: Heber WATT of Harbourne twp & Alma BOICE of Guilford twp., 4 July 1906 at Maple Lake,, Stanhope twp

10873-80 (Victoria Co): George W. WOODCOCK, 23, farmer, Reach twp., Coboconk, s/o James WOODCOCK & Catherine BROCHERN, married Mary Jane BOYCE, 19, Coboconk, same, d/o Isaac BOYCE & Elizabeth BAGEROW, witn: John N. WOODCOCK & Cora McLAUGHLIN, both of Coboconk, 12 Oct 1880 at Kinmount

Here's the 1911 census transcription which at least gives you b.d.
1911 / Ontario / Victoria-Haliburton / 26 Guilford and Dysart Townships / page 6
31 65 BOICE Isaac M Head M Jan 1839 72
32 65 BOICE Elizabaeth F Wife M Jul 1843 67
33 65 BOICE George M Son S Aug 1875 35
34 65 BOICE Alma F Daughter S Aug 1888 22

I expect this is Betsy's brother Reuben.
1911 / Ontario / Victoria-Haliburton / 49 Somerville Township / page 3
11 26 Barjarous Reuben M Head M Apr 1868 43
12 26 Barjarous Jennie F Wife M May 1873 38
13 26 Barjarous Archie M Son S Oct 1890 20
14 26 Barjarous George M Son S Mar 1892 19
15 26 Barjarous Lalla F Daughter S Sep 1895 16
16 26 Barjarous Stanley M Son S Dec 1896 14
17 26 Barjarous Tracy M Son S May 1899 12
18 26 Barjarous Ruby F Daughter S Oct 1902 8
19 26 Barjarous Isaac M Son S Feb 1906 5
20 26 Barjarous Lorne M Son S Jul 1908 2

Rueben in 1901 (the spellings just get stranger and stanger!)
6 35 52 Barfarow Ruben M Head M Apr 29 1867 33
6 36 52 Barfarow Jennie F Wife M May 14 1873 27
6 37 52 Barfarow Archie M Son S Oct 10 1890 10
6 38 52 Barfarow George M Son S Mar 9 1892 9
6 39 52 Barfarow Lalla F Daughter S Sep 19 1894 6
6 40 52 Barfarow Stanley M Son S Dec 6 1896 4
6 41 52 Barfarow Tracy M Son S May 5 1899 1
1901 Census of Canada
Subdistrict: Bexley, VICTORIA (North/Nord), ONTARIO
District Number: 119
Subdistrict Number: b-1
Archives Microfilm: T-6501

Betsy's brother Francis
7 11 62 Badgerow Francis M Head M Jun 12 1864 36
7 12 62 Badgerow Johanna F Wife M Aug 26 1864 36
7 13 62 Badgerow Mary Elizabeth F Daughter S May 9 1889 11
7 14 62 Badgerow Thomas Albert M Son S Aug 9 1891 9
7 15 62 Badgerow James Garfield M Son S Sep 5 1899 1
7 16 62 Badgerow William Henry M Brother S Mar 6 1861 40