I know this is an older thread, but ...In case you want to look further once you have found the patriarch, you might want to consider looking at this, as some Nfld. spelled it
The census all appear to say "English" heritage
http://www.rootschat.com/links/01em7/Was thinking perhaps the surname was a misspell of Zacharie, but I looked for Saccary on the FHS site just for fun, and did find a pocket of the saccary spelling in early Kent England, ( a Sacary in 1642 Surry, a John Sacarie was christened 1582 Ightam Kent) then I tried Sacrie and found many in various locations, although the very earliest were again in Kent with the odd one in Sussex. Sakry, Sakre, Sacray, Secray, Sacrey, sacry, Sackry, Sakry, Sachree, Sackree, Seacre, Seecree, Sacrye even a Soakrey & a Sicr...I may not have listed them all
http://www.rootschat.com/links/01em8/There was even a marriage of a Saccary in Prussia mid 1700s and a few Sacary births in Galacia, early 19th century which could be the Zachary phonetics...So hard to say if the origins are French or ? ( Just also found some early 1800s Prussian marriages with spelling Sacrè and Sacre' )
Looking at the U.K. FreeBMD you can find
Sacree, Sacry, Sacrey, Sacret, Sacret, Sacrit, Sacre, even with an accent SACRÉ.
It doesn't appear to be too common a name if these prove to be the same surname... J.J.
adding: The surname Sacre/Sacré in England gives a whole raft of results as well....