What an interesting story, Ann!
He's a bit different in that most of our ancestors probably didn't deliberately disappear, but he did!
With a common name like that, and the possibility that he could have gone to a number of countries, he will be SO hard to find! (It's even possible that he could have changed his name at some stage, to avoid being found!!) The Australian states and Canadian provinces all have their own bmd systems, all different, and varying widely in their availability for searching (including whether indexes are on the Internet!) And there are ten Canadian provinces and six Australian states, and this isn't even mentioning New Zealand.
I think you are right; the only way forward is to put his details out there in as many places as possible, and hope to find his descendants wherever it was that he did a runner to!!
Couldn't you just strangle them??

MarieC