Swedish parish records are exceedingly detailed. The wife of Ola Nilsson should be easy enough to find if someone has the time to look at marriage records and the household examination records, and if any children were born, the parish records should also list those children.
I don't have time to do any further searching for you, but link to this thread when you post on the Sweden forum. You don't want the helpers to spend their own limited time looking up the exact same information I checked. I am sure you would like new information.