I have got this far and would like to post this :
Update: We have now found and tracked Patrick Brien's line back as far as about 1880. That chase is ongoing. It remains now to find where Ann Kelly came from. There is now family lore linking her to County Kildare, more specifically Naas. On her Dec 1928 marriage certificate both she and Patrick are shown as minors. That indicates they were both under 21. We now know that Patrick was born in 1910 and a browse of the 1911 Kildare census didn't produce an Ann Kelly with a father James born late enough to still be a minor in Dec 1928.
However 'new' family lore suggests her father was 'Tomas' and her mother Bridget. A blow-up of her father's name on the marriage cert is below. It looks like James but there could have been an error when transcribed from the parish register.
The birth that Shane147 found in 1907:
name: Anna May Kelly
registration district: Naas
event type: BIRTHS
registration quarter and year: Apr - Jun 1907
volume number: 2; page number: 822
This would match what is believed to be her death in Cheshire but it could be a coincidence:
Death: BRIEN, Anna May
Registration district: Wallasey, Cheshire
Year of registration: 1995; Month of registration: February
Date of Birth: 29 April 1907
There's also an entry in the 1911 for Co. Kildare which gives a father as Thomas and a mother Bridget.
Kelly, Thomas - 30 - Head - Co Kildare - Labourer (Farm)
Kelly, Bridget - 29 - Wife - Co Kildare
Kelly, Anne Mary - 3 - Dtr - Co Kildare. [This child would be under-age in 1928]
If she was indeed born in April 1907 she wouldn't have been a minor in December 1928. It is possible that the birth date in the death notice is a deliberate contortion of the truth to hide the fact she was under-age when she married.
Ideas, suggestions anyone?
David.