Swearing an Oath of allegiance was part of the act of admitting an alien (non-British subject) to citizenship. The naturalization process involved oaths of allegiance, oaths of residence, and certificates that the two oaths have been taken and that the applicant is of good character.
The Upper Canada Sundries have miscellaneous Oaths of Allegiance
Search billions of historical records and family trees on Ancestry, including immigration records, passenger lists, naturalization records, census records, and other documents that can help trace your ancestors' journey.
Start your Ancestry free trial
1819 Oath of Allegiance Hugh Kennedy 
1804 Oath of Allegiance Jacob Rawn 
1817 Oath of Allegiance George Garside. Upper Canada Sundries: C-4549
The Archives of Ontario holds some Oaths of Allegiance
*F 542 Robert Nelles family fonds 1759-1877
*RG 22-771 Oaths of allegiance book 1837-1842
*RG 22-72 Grey County Court of General Sessions of the Peace minutes 1854-1861, 1869-1943
*RG 22-3981 Oxford County Clerk of the Peace oaths 1844-1934
Free trials are a great way to save money on pay-to-view subscriptions. Try these free trials to find your ancestors and start your family tree. Ancestry.com Free Trial, Ancestry.ca Free Trial, Ancestry.UK Free Trial and Ancestry Australia Free Trial
Choose from Naturalization Records Before 1854 ~ Naturalization Records 1854-1917 ~ Naturalization Records After 1917 ~ National Registration File 1918 ~ National Registration File 1940 ~ Sessional Papers ~ Passports ~ Border Crossings ~ Oaths of Allegiance