Welcome: What part of the world are we talking about? I'm assuming the United Kingdom. If he lived in Scotland then his death won't appear on the GRO, and likewise for Ireland. And, for instance, there were one or two wars going on towards the end of the 19th century - India and the South African wars to name just two, or did he emigrate as it was also the time when people were moving around a bit more. Do you have any later information on Owen?
BumbleB