Searching for Ancestor with surname Bryan

Dear Clare Doyle,

Further to my previous correspondence with you (Thanks for your previous response) regarding William Ryan born between 1839 and 1843 according to England census records, I have now discovered a new census that records the following:

1851 census reveals an Alfred William Bryan born about 1842, age 9, born Ireland living with his parents "James and Maria" Bryan in the Civil Parish of Birkenhead, EP is Holy Trinity, County is Cheshire, Country is England. Registration District is Wirral, Sub is Birkenhead, ED is 11, Household Schedule os 159, Piece is 2175, Folio is 276 and Page Number is 55.   I think the only significant difference between 1851 and 1861 census is the change in Registration District from Wirral to Birkenhead.

Assuming this census is correct then my GG Grandfather left Ireland as a young boy much earlier than I thought.  The other thing is that even though my GG Grandfathers marriage certificate records his surname and his Fathers surname as "William Ryan" and James Ryan respectively rather than Bryan, I think it is not unlikely that my GG Grandfather preferred William to Alfred and made a conscious decision to drop his first name altogether.  I also think it is quite possible that when my GG Grandfather and his parents James and Marie came to England, that they arrived in England with a marked strong Irish accent.  When my GG Grandfather known as William (Rather than Alfred William) got married just maybe his very strong Irish accent caused confusion and his surname Bryan was recorded in error simply as Ryan.  Also, because of my GG Grandfathers inability to read, write or spell, his surname was not corrected.

Also, I have viewed Griffiths Valuations and I saw 4 people with the name James Bryan and 1 person with the name James O' Bryan in the County of Antrim.  There are 3 possible parishes where my GG Grandfather was baptized which are:  Ballymoney, Shankill and Derryaghy.  As my ancestor known as William indicates on 1871 census that he was from Antrim it is my hope that it is possible for someone on this Forum to volunteer to conduct a search on my berhalf?

Can someone please conduct a search for Alfred William Bryan born between 1839 - 1843 to James and Marie Bryan, who was baptized either at the parish of Ballymoney, Shankill or Derryaghy, Antrim. 

I hope this is not an impossible task to undertake?  I hope for a positive response.  Thank you for considering my request.

Regards,

Waterford246