Well from wiki
1949 to 1982
....
However, CUKCs, in common with citizens of other Commonwealth countries[citation needed], also retained the status of British subject. From 1949, the status of British subject was also known by the term Commonwealth citizen, and included any person who was:
- a citizen of the United Kingdom and Colonies;
- a citizen of any other Commonwealth country; or
- one of a limited number of "British subjects without citizenship".
Citation needed but it seems like the UK considered Canadians to be British Subjects even if Canada didn't. I had a good dig around but I couldn't find much other stuff on this subjects.
Edit: confused myself now.
If you were considered a British Citizen by the British government (which seems to be the case according to the limited info I can find on Wiki) then by the Hong Kong belonger status which says:
(iv) a British subject married or who had been married to, or was a child of, a person mentioned in sub-paragraph (i), (ii) or (iii);â€." and doesn't mention male or female then it seems like you could get it.
I don't really get why the Belonger status differs from CUKC law? was that belonger status legislation in place when you were born? I've only had 2 hours sleep though, so forgive me for being confused.