Look at your own profile page. On the upper right there is a 'lock' in a colored circle. Above that in small print there are five options in small print. Your wikitree id is Watson-12161 and you should see it there. On all profile pages, that is where you can find the WikiTree ID.
This might be Iva is the census:
SOURCE: Canada Census, 1901," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KH2K-5CF), Iva Toal in household of William Toal, E, Elgin (west/ouest), Ontario, Canada; citing p. 9, Library and Archives of Canada, Ottawa.
William Toal Head M 30 Ontario Elvina R Toal Wife F 27 Ontario John F Toal Son M 3/12 Ontario Iva Toal Dau F 4 Ontario William Toal Son M 3 Ontario
This looks like her parent and grandparents:
Ontario Marriages, 1869-1927," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:FMK8-NJD), William Toole and Alvira R Forsyth, 20 Dec 1895; citing registration , Thedford, Lambton, Ontario, Canada, Archives of Ontario, Toronto; FHL microfilm 1,870,709.
Name William Toole Male Age 24 Birth (Est) 1871 Father Nelson Toole Mother Mary Ann Toole Marriage 20 Dec 1895 Thedford, Lambton, Ontario, Canada Spouse Alvira R Forsyth Female Age 23 Birth (Est) 1872 Father George Forsyth Mother Ann Jane Forsyth
IMAGE AT: https://familysearch.org/ark:/61903/3:1:9Q97-Y39B-Z6K?mode=g&i=207&wc=3N7B-JWL%3A1584309303%2C1584320101%2C1584320102%3Fcc%3D1784216&cc=1784216
Births of Iva's siblings is below, I couldn't find hers:
https://familysearch.org/search/record/results?count=20&query=%2Bgivenname%3A%22elvira%20elvina%20R%22~%20%2Bsurname%3Aforsythe~%20%2Bbirth_year%3A1870-1879~%20%2Bmarriage_place%3A%22ontario%2C%20canada%22~%20%2Bmarriage_year%3A1885-1895~%20%2Bspouse_givenname%3Awilliam%20%2Bspouse_surname%3Atool~
This doesn't answer your question, but it does list her parents.
SOURCE: Ontario Marriages, 1869-1927, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QK9S-VDYW), Neil Harold Watson and Iva Laurell Toole, 21 Jan 1918; citing registration , London, Middlesex, Ontario, Canada, Archives of Ontario, Toronto; FHL microfilm 2,148,998.
Name Neil Harold Watson Male Age 25 Birth (Est) 1893 Father Angus Watson Mother Amelia Hamil Marriage 21 Jan 1918 London, Middlesex, Ontario, Canada Spouse Iva Laurell Toole Female Age 21 Birth (Est) 1897 Father Wm Toole Mother Elvira Forsythe
https://familysearch.org/ark:/61903/3:1:33S7-9BLZ-BDN?mode=g&i=1054&wc=3NWH-PTL%3A1584308903%2C1584353701%2C1584356001%3Fcc%3D1784216&cc=1784216
Findagrave entry for Neal Watson Find A Grave Memorial# 50261149
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=50261149
Census data for Neil and parents on this page
https://familysearch.org/search/record/results?count=20&query=%2Bgivenname%3Aneal~%20%2Bsurname%3Awatson~%20%2Bbirth_place%3Acanada~%20%2Bbirth_year%3A1890-1894~%20%2Bany_place%3Acanada%20%2Bany_year%3A1830-1940~%20%2Bspouse_givenname%3A%22iva%20laurel%22~%20%2Bspouse_surname%3Atoole~%20%2Bfather_givenname%3Aangus~%20%2Bfather_surname%3Awatson~%20%2Bmother_givenname%3Aameilia~