This is what I know about the Orford part. My great grandfather John Mitchell's mother was Elizabeth Orford. I don't know the dates of her birth. I know she married Patrick Mitchell. That they had several children John,Elizabeth,Patrick,Michale,James, Delia, Mary, Sarah,Anne and Margaret. John was born in Kildare,Kildare,Ireland. I have his baptism certificate. John immigrated to New York.
The Ryan name comes from Elizabeth Mitchell who married a Ryan. I have a few children for them Lily is one and then I found a Mariar, Rebecca and John. I am not sure about all of them except for Lily.
Byrn's name comes from Patrick Mitchell father was James who was married to an Anne Bynes. I don't have any info on her except for the children Patrick, who I am sure of then I found an Ally, David and Mary.
I don't kow if this is the same people.