I had a look at some city directories at the Toronto Central Reference Library. There aren't a lot for Oakville and they're sporadic. Here's what I found:
1960
Halliday Edgar M sign pntr 184 Kerr n h same
Halliday Margt slsldy The Golden Hour r 184 Kerr n
Halliday Alex G sls manager Merck Sharp & Dohme h 422 Sandmere place
1962
Halliday Alex dist slsmgr Merck Sharp & Dohme h 1176 Willowbrook dr
Halliday J Donald slsmn Sonoco Prod Co h 1332 Amber cres
1965 - no Hallidays
1971
Halliday Alastair C (Patricia) slsmn International Chinaware h164 Douglas Av
" Edgar M (Hettie) h4210 Fourth Line N
" Kenneth S (Mary) asmblr Ford h1503 Constance Dr
" Murray J (Lorraine) chartered acct Clarkson Gordon & Co h2207 Sunnyvale Dr
" Robt r1571 Venetia Dr
" Robt B (Susan) slsmn Corbett Sports Ltd h602, 125 Forsythe
1973
Halliday Alastair C (Patricia) slsmn Internatl Chinaware Ltd h164 Douglas Av
Halliday Bob truck driver r126 Stewart
" Edgar M (Hettie) farmer h4210 Fourth Line Rd
" Kenneth S (Mary) asmblr Ford Mtrs Co Ltd h1503 Constance Dr
" Murray J (Lorraine) chartered acct Clarkson Gordon & Co Ltd h2207 Sunnyvale Dr
" Robt r1571 Venetia Dr
1975
Halliday Alastair C & Patricia; slsmn Internatl Chinaware h164 Douglas Av
" Douglas & Hazel; management consultant Currie Coopepers Lybrand h269 Spruce
" Edgar M h4210 Fourth Line
" Kenneth S & Mary; asmblr Ford Mtr h1503 Constance Dr
" Robt r1571 Venetia Dr
There weren't any books for Paris but since it's only 8 miles or so from Brantford, I'll have a look for James Begley in the Brantford books on my next visit. They go up to 1964.
I hope there's a lead in there somewhere.
mat