Found the following which could be his parents: https://familysearch.org/pal:/MM9.3.1/TH-1961-28020-10153-85...
From Notre Dame de Quebec;
The 30th of August 1842 marriage between Joseph Napoleon Frenier Living in Montreal son major of Francois Frenier and Jeanne Brown of one part and Helene Cook daughter major of the late George Cook and the late Elizabeth (looks like) Dalaire of the other part.
The names and dates seem to match.
There are records for a parish of Frelighburg, but the records don't start till 1886 so don't know where he would have been baptized.