Our privacy laws are quite strict up here, so it makes it harder to find someone.
About the most you could do is google names, birthdates, and any other info you might know, and hope something pops up.
Most of the "people finder" type of sites, hit a wall when it comes to Canada.
Unless there's a good hacker out there, or someone has access through their job, or someone they know has access through a job, the databases of most things are well hidden.