Angel and Butler Families of Cork circa 1861

My G Grandmother, Annie Angel Butler was baptised in Cork in 1861. The attached bap. cert. was made out 51 years later and the family thinks that the name Mary Ann for the babywas a mistake, perhaps her mothers name was written in place of hers. she always went by Anna or Annie. Family lore says she was born on Guernsey, and christened as Ena Angel, and then baptised back home in Cork. ??She moved to the states in about 1877, had 9 fine children while living in Ohio, and died in 1950. I feel lucky to have found this birth certificate, which I think is actually hers. She would perhaps have gotten it in 1912to get a passport for travel.I would love to find more about thefamily in Cork.

Where did she live? Any sign of brothers or sisters?

Any sign of emigration about 1877? Alone or with her family?

Who is the Sponsor Mary Sheridan? Is that a different maiden name for her mother? So much hinges on so little.

A thousand thanks to anyone who has any answers, or can point me in the right direction.

Happy St Brigids Day to you