I have a Mary Ann MacNamea who married Isaac Hall at Bradfield, YKS in 1858. She died in 1860 when her youngest daughter, Maria, was born. In the 1861 England census there's a Daniel (22) and Alice(20) MCNEEMER working for Isaac Hall and family. They were from Forkill, Armagh, Ireland. Mary's husband was born circa 1809 at Bradfield. I don't know how old May was. Would your 1821 Census ( or a later one) have any info about Mary Ann MacNamea's Family.
Thanks,
Marilyn