About Rose Anna Kerr
Thomas Kerr's death certificate indicates he was born in Bartibogue (sic). Bartibog is in Alnwick Parish and the 1851 census shows only one Kerr family living in that parish including a son named Thomas of about the right age, I therefore assume that this is Thomas and he is the son of Adam and Rose Kerr.
Adam and Rose emigrated to Canada in 1823 according to the 1851 census. Their children were all born in Canada.
Rose is living as a widow in the home of her son William in 1871.