I just checked the Ontario Death Index (1869-1934) on ancestry.ca for "Warn* White," "Worn* White," and "Wern* White," allowing for various spellings of his first name, and got NO hits at all.

Then, did a check for simply WARNER with no Surname, got 114 hits, but none that even remotely match your Warner White. No hits for WORNER, 47 hits for WERNER, but again, nothing even close to your Warner White.

Then, I checked the Ontario Births Index (1869-1909) for Kent County, didn't find any with either parent's name Warner or Louise White.
One thing I noticed, however, is that this index allows for searching by the mother's MAIDEN name.

*** Have you any idea of Louise's maiden name so I can search this way?

- Lisa