Can anyone help with Irish records

[thunderonlyhappenswhenits]

I have been trying and failing to find my grandads Birth certificate. He was born in Dublin in 1933/34 and moved over to England at some point and met my nan and married her in 1954.
I've got the marriage certificate but cannot find his birth certificate on the Irish records anywhere. It's driving me mad. It's like he didn't exist! My dad was adopted so he can't tell me much. Is there any kind of special company I can use who would find it for me ? I've tried putting his name in different ways, changed the year of birth etc but nothing comes up at all. I thought by getting the marriage certificate I could find out his dads name and go about it that way, but his dad had the same name lol. I'm no good at this stuff either don't really know what I'm doing. So I'm stuck !
Any help would be greatly appreciated
Thanks

Rarer names definitely make searching easier.
Do you have a rough idea of place of birth at all? You might need that if the name is a very common one.
I would email as Foxy suggested.
I'm afraid I'm a novice at this and not much help, I'm sorry.

May have had a break though! My uncle has sent photos of passport, death certificate and limited version of birth certificate 👍🏻👍🏻

If you know the area, lots of local genealogy groups online who will go to local church and look up these things for you.

I was going to suggest are you sure his birth was registered.
My mother discovered while applying for a passport that her birth had not been registered.
Her mother had died a few days after she was born .I would imagine it was an over sight after my grandmother died.
However she was baptised.

That's great news thunderonlyhappenswhenits.

@thunderonlyhappenswhenits
I got information for my husband and his siblings by going into the Births Marriages and Deaths Register Office and painstakingly going through the dates and names. It took me a few afternoons.
Hopefully you don't have to do that with the information from your uncle.