You likely have looked at all this before by new eyes sometimes help.
From Drouin Collection - Ontario Catholic Records
Archibald Chisholm, s/o Angus Chisholm and Catharine Mcdonald married Theresa McGillis d/o Angus McGillis & Mary McDougald. Witn: Duncan Kerr and Catharine McDonald.
Lochiel Glengarry 16 Oct 1893.
On marriage rego for Christina, Daniel James has the same parents [as you already know]
From Ancestry.ca Ontario marriage records
Archibald Chisholm, 25, born and living Lochiel, farmer, parents as above married Theressa Jane McGillis, 18, born and living Lochiel, parents as above [father listed as deceased]. 18 Oct 1893.
Glengarry County. Transcribed as Parry Sound on Ancestry.ca
Ambrose Malcolm Chisholm b 7 Dec 1900, s/o Archibald Chisholm & Theresa McGillis
Glengarry County [again transcribed as Parry Sound]
Mary Ella Cora, 31 March 1904, d/o Archie Chisholm & Theresa McGillis
[married William Donald Joseph McMillan 1931 Apple Hill Ont].
She is on a Grant family tree on Ancestry.ca with the above parents listed but no siblings mentioned].
Kenyon Glengarry County
Angus Mark, b 24 July 1909, s/o Archibald Chisholm, farmer, and Teresa Jane McGillis.
Parents married Lochiel October 1893. Their address is given as Apple Hill.
1911 census Kenyon Glengarry
Archie and family are listed under Chishom. No Christina listed.
In the Druoin records I am looking at no parents are given for Christina. Rats! She should be on 1921 census in Alexandria Ont.
I am surprised the Catholic church would marry uncle and niece unless, of course, they didn't know which is always a possibility. Maybe that is why her parents aren't listed.
Is this her?
1921 census Lochiel Glengarry
Catherine, 81, b Ont
CHRISTINA, 22, granddaughter.
Archibald Chisholm's mother's name is Catherine Mcdonald. Maybe his second name was McDonald.
1911 census which you mentioned.
Tena, c Jan 1901 could be the above granddaughter not niece. Census are not always correct. They are living a couple of doors away from a McGillis family and also a Duncan Kerr who was witness at Archy and Theresa's marriage.
Catherine Chisholm, widow, is living by herself on 1901 census Alexandria Glengarry County.
Here is something on a Donald James Chisholm
9 Mar 1944 Blaine Washington entry
b Lochiel Ontario, aged 63, farm labourer, living Smithers BC, brother: Alex Chisholm Smithers BC, in US from 1924 to present -ILLEGALLY, widowed. Canada Passport no. 198615 Valid to May 1944.
Employer: P McMillan, Harrison Montana.
If he was in the county illegally he likely isn't on any census.
Archibald Chisholm, 68, died 11 Jul 1948, witnesses to burial, sons Colin, Mark and Ambrose.
No much help. Good luck.