HI I Have Hit a Brickwall Researching My Irish Family Byrne Connolly and Smith I Have Got Stuck with Ojons Smith Who is on a Marriage Certificate for ...

I have tried a range of names such as Owen John and Eugene with Smith and Smyth(e)without any luck.
Based on Thomas Smith's birth date I would guess that Ojons would have been born somewhere between 1800 and 1822. The rest of the family was from Drogheda, Louth, Ireland but he could have been from elsewhere.
I would appreciate any help.