— born in Canada East [now QC]:
3.  Elizabeth Louisa "Levicey/Levicy" THOMPSON, b. 1844/5 
4.  [Lavinia/Lavina] "Leviney/Leviny" THOMPSON, b. ca. 1846

[Lovisa and Lovise are alternate (Scandinavian) spellings of the English name, Louisa; Levicey and Levicy are phonetic mis-spellings or nicknames.  Leviny and Leviney are nicknames for Lavinia or its short form, Lavina.  Note that John Nelson named a daughter, Lavina, probably for his sister.]

1.  1881 Canadian Census Index/Extraction (online at FamilySearch.org; FHL Film #1375879; NA Film #C-13243):  Sinclair & Franklin [Twps.], Muskoka [Dist.], Ontario, District 131, Sub-district L, p. 11, Household #51:

Name	Marital Status	Sex	Ethnic Origin	Age	Birthplace	Occupation	Religion
John THOMPSON	M	M	Scottish	61	O <Ontario>	Farmer	Bible Christian
Francis Jane THOMPSON	M	F	Scottish	61	New Brunswick		Bible Christian
Welington THOMPSON		M	Scottish	13	O <Ontario>		Bible Christian
Emily Jane THOMPSON		F	Scottish	7	O <Ontario>		Bible Christian

Wellington is John's nephew, son of his brother, Hiram THOMPSON.

2.  Messages posted to the KETCH Surname Board (online at Ancestry.com).

3.  Messages posted to the New Brunswick, Canada, Genealogy Forum (online at GenForum.com).

4.  Participant in the THOMPSON Y-chromosome DNA Surname Project at FamilyTreeDNA:

JOHN2 THOMPSON, SR (FATHER1) was born Abt. July 1818 in Upper Canada, and died July 22, 1890 in Unorganized Twp, Parry Sound, Ontario, Canada. He married FRANCES JANE KETCH January 20, 1837 in Home District, Ontario, Canada, daughter of WILLIAM KETCH and ABIGAIL ANDERSON. She was born Abt. September 1819 in New Brunswick, Canada, and died December 01, 1887 in Unorganized Twp, Parry Sound, Ontario, Canada. Children of JOHN THOMPSON and FRANCES KETCH are: 4.   i. WILLIAM3 THOMPSON, b. Abt. 1838, Of Egremont, Canada; d. September 09, 1923, Muskoka District, Ontario, Canada. 5.  ii. JOHN NELSON THOMPSON, b. Abt. April 12, 1839, Ontario, Canada; d. August 09, 1909, Franklin Twp, Muskoka, Ontario. 6. iii. ELIZABETH LOUISA LEVICEY THOMPSON, b. Bet. 1844 - 1845, Quebec ?.     iv. LEVINY THOMPSON, b. Abt. 1846, Lower Canada.      v. ALFRED THOMPSON, b. Abt. 1863, Ontario, Canada; m. JULIA ANN.

John Thompson Sr. 1818 born. based upon age at death. 1837 Jan 20. Married in Home District, Ontario, Canada. Maiden name, marriage info., their residence was North Gwillimbury, married by bands. Minister-Cornellius Flummerfelt of the Wesleyan Methodist Church. Source-Marriage records, Home District, Ontario, Canada. I have a copy. 1845 - I believe the family may have been in Quebec at this time. Daughter Elizabeth Louisa lists her place of birth as Quebec Prov. 1851  Census- unable to locate - May have been in Quebec. 1861 Census, Georgina Twp, York County, Ontario w/wife Francis, & two daughters, Levisy, Leviny- place of birth for the girls is listed as Lower Canada. Living next to Nelson Ketch.  1871 Census, Egremont Twp, Grey County, Ontario w/wife Francis, w/Alfred & Wellington. Living next to William Ketch. (Alfred & Wellington aka George Wellington aka WAC, listed as nephews in the WILL) Con. 17 Lot 10, Tenant, 50 acres, 5 improved, 5 pasture. Occupation: Cooper 1881 Census, Franklin & Sinclair Muskoka, Ontario, Canada.  61 yrs, living with wife, Francis 61 yrs, Wellington Thompson 13 yrs, & Emily Jane 7 yrs (listed as niece in the WILL).  Origin of all is listed as Scottish.  All born in Ontario except Francis who was born in New Brunswick.  Religion for all is Bible Christian. 1890 July 22 dod. Source-Ontario death/land records. I have a copy.

Francis Jane Ketch Thompson A letter dated December 1887 from Charlotte Ketch McKenzie to her sister mentions Aunt Fanny and Uncle John Thompson. Mentions Aunt Fanny's death at the beginning of the month, and that she had had a hard time of it. This links William Ketch as Frances Jane Thompson's brother. (We have a copy of the letter.)

Alfred Thompson 1871 Census, 8 yrs. Living w/John & Francis Thompson  & Wellington Thompson, 3 yrs. Egremont, Grey County, Ontario Canada. 1881 Census, Ontario, King, York North, 18 yrs, Occ-laborer, born-Ontario, Religion-Methodist. FHL film 1375885, NAC C-13249, Dist 137, Sub Dist A, Div-1, Page 41, Family 184. 1890/1906 of Sinclair Twp, Per Will of John Thompson Sr. in the Land Abstract Index records listed as a nephew, Wife Julia Ann. Family rumor.  He lived in Simcoe County, Ontario, Canada. Source-Kathy McDonald Do not know what happened to Alfred or who his parents really were.  Good chance he was the full brother of George Wellington Thompson. Possibly Alfred was a second name. George Wellington is listed in census as Wellington.

5.  [Geographic] History of Ontario (online at the OntarioGenWeb site at RootsWeb.com [link died]):  prior to 1841, Quebec was known as "Lower Canada" and Ontario was known as "Upper Canada"; from 1841 to 1867, Quebec was known as "Canada East" and Ontario was known as "Canada West"; from 1826 to 1838, the "Home District consisted of the current counties of most of Dufferin, part of Durham, part of Grey, Peel, part of Muskoka, part of Parry Sound, Simcoe, and York"; in 1838, the "Western District consisted of the current counties of Kent and Lambton"; modern county boundaries were achieved in 1888.