If you know his full name and the area and approximate year he passed away you can search for him on Ancestry. Easier to find if he has an unusual name. My ancestors are all William Smith!!!!
It's helped me a lot over the years and is especially useful if the deceased's family put an announcement in a newspaper. Be aware though that it may take some trawling to get to what you want and the more info you have to put in the search box, the better.