Nicola;

Unfortunately, Canada didn't start recording birth and death records on a national level until 1869, but some early birth registers exist, as do many church baptism records dating back to the early 1800s and some even earlier.

I did check on Ancestry.ca (the Canadian version of Ancestry.com) their Ontario births collection, which dates from 1869-1907 and found no NIXes to match your family, using exact and Soundex search options for NIX, NIKS and NICKS. The search engine allows you to also input the names of the parents, and using the first names you provided, found absolutely nothing in that time frame ... I was hoping to snare one of her siblings.

Then, I searched the 1871 Ontario Census for the same family, found only one John Nix, b. Germany., was living in Northumberland East. Did searches for NIKS and NICKS, nothing even close.

Immigration records I searched (Ancestry.ca) for John Nix, found only one who was even in the country in 1863, but that John Nix came into the country in 1783 from Germany. Searching for Nix variants revealed nothing as well.

HOWEVER, I did find something that might be of interest to you. I searched the 1881 Canadian Census and found:
1863, John Henry Nix born in Ontario, the son of Jessa Nix, in 1881 they were living in Mariposa, Victoria, Ontario. Perhaps this is your fiance's family?

Every other John Nix (and variant spellings) was born in Canada.

A further search of the 1881 Canadian Census (on familysearch.org) revealed the following Annie Nixes:
1. Annie NIX - 1881 Canadian Census / Nova Scotia
Gender: Female Birth: Nova Scotia
2. Annie NIX - 1881 Canadian Census / Nova Scotia
Gender: Female Birth: Nova Scotia
3. Annie NIX - 1881 Canadian Census / Ontario
Gender: Female Birth: O.
4. Ann Elisabeth NIX - 1881 Canadian Census / Ontario
Gender: Female Birth: Ontario
5. Anna Maria NIX - 1881 Canadian Census / Ontario
Gender: Female Birth: England

Number one on the list (b. 1863 in Nova Scotia) shows that her father was Charles Nix, who was Irish.

Number two on the list (b. 1860 in Nova Scotia) shows that her father was James Nix, who was German.

Number three on the list shows that her father was David Nix, who was Dutch.

Number four on the list show that her HUSBAND was Thomas Nix, who was English. No idea of her maiden name.

Number five on the list shows that her HUSBAND was Charles Nix, who was English. No idea of her maiden name.

................
Where to look next?
- There are several church registers available for the Toronto area, from the Mormon Family History Library (you can rent the microfilms from your local Family History Center [FHC] for a nominal fee).

- You can also search Toronto City Directories to try to find at which time the family first appeared ... may help narrow your search timeframe.

- There are also early Toronto area immigration/emigration records on microfilm but they are not allowed to circulate to the FHCs, but you may have better luck doing an Interlibrary Loan (ILL) from the Library and Archives of Canada (LAC) to a local library in your area, or from the Ontario Archives.

If there's any chance you can travel to Toronto yourself, the Ontario Archives is a phenomenal resource with many helpful people there.

FINALLY, I did a general search for "Ann* Nix" on Ancestry.ca and found several listed in marriage registers. One in York County (where Toronto is located) was in 1897 to Robert Thomas Walker, states her approximate year of birth as 1870, but she was the daughter of David and Lillie Nix.

That's all I could find online. Sorry I couldn't be of more help. All the best in your search.

- Lisa B. Lee, PLCGS
Oakland, CA