Our Brick Wall

We are seeking any help avilable regarding the following people:

1. Who are the parents of Rolinda McManus (1829-1899, wife of Isaac Lynch)?
2. Who are the parents of Mary J. Cooper (1838-1917, wife of Richard Meredith)?
   Mary's obituary identifies her parents as Mr. and Mrs. Fred Cooper. Various Census Records say she was born in Nova Scotia. Her obituary also says that she moved to Utah at an early age with her parents. .She was married in Utah, and moved to Nebraska in 1864. We can find no records in Utah of her parents.