Hi Margaret,
I can understand your privacy concerns. Since he is a notable, I would include the names of living relatives, if their names are widely available on the internet. I'd probably only include his wife and parents though. Anyone else living, I'd leave off. Others may have other opinions. :)
If you edit this post and add the location tag Canada, you will get the attention of more members of the project.
Good luck and let me know if I can help.