Only 1 entry in the list is a widower. Had a quick look for him in 1891 census and found 1 right age, married with several children. I need to check the census further.

1. WATTERSON, William Henry 25 Feb 1892 C rus 65 COLLISTER, Catherine
2. WATTERSON, William Edward 2 Mar 1893 C arb 39 QUALTROUGH, Catherine Isabella
3. WATTERSON, William 27 Apr 1893 C mal 113 KELLY, Charlotte
4. WATTERSON, William Thomas 15 Jun 1893 C mal 114 TAGGART, Christina
5. WATTERSON, William 2 Jan 1894 C rus 80 COLLISTER, Jane
6. WATTERSON, William Edward 30 Aug 1894 C mal 127 CAIN, Elizabeth Anne
7. WATTERSON, William Henry 9 Feb 1895 D bra 622a FISK, Mary Ann [Age 55. Groom: Widowed. Groom's father: William]
8. WATTERSON, William 1898 P WM 34 QUIRK, Alice Jane
9. WATTERSON, William 18 Sep 1898 D bra 734b CLUCAS, Jane
10. WATTERSON, William James 3 Jan 1901 P fox 29 BELL, Edith Jane [FS:1900 Age: 22. Groom's father: John Watterson]
11. WATTERSON, William Henry 20 Oct 1903 C mal 222 TAGGART, Sarah
12. WATTERSON, William Arthur 24 Sep 1904 C mal 233 KEWLEY, Elizabeth Catherine
13. WATTERSON, William Henry 28 Sep 1905 C rus 183 KARRAN, Isabella Margaret
14. WATTERSON, William Frederic 7 Apr 1906 P ger 214 KEIG, Elizabeth
15. WATTERSON, William 27 Oct 1909 P ger 232 TEARE, Catherine Jane [Age: 40. Groom's father: John Watterson]
xx. WATTERSON, William Henry 2 Oct 1909 braddan BLACK, Eleanor [Groom's father: John Henry Watterson]