Chang of Birth Name Question

I checked on the irishgenealogy.ie site and it appears the baby was registered as Patrick, copy of entry but unfortunately certificate is not available.

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Barlykins,

Could this person be the Patrick Ronald you are enquiring about?

You will need to get the marriage certificate in the Dublin office.

There is a possibility that the person filling out the birth record in the Rotunda made a mistake.

I have checked Subscription site www.rootsireland.ie for this birth with negative results. The family could have been Church of Ireland.

Regards,

I found a marriage certificate for a Patrick Ronald Goodwin , clerk, address 8 Iona Drive, son of John Goodwin , a farmer. 24/07/1945 His spouse is Margaret Byrne of 14, Northbrook Road, daughter of Patrick Byrne an auctioneer.

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I found a birth record for Rose Goodwin (Note the witness to the marriage above) It appears she is Patrick's sibling.

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Thank you all for your help, I have lots of records for the Goodwin family I am researching it was just this one that had me stumped. 
I think the answer might be that a mistake was made and the father’s name John was inserted in error as the name of the child.