One reason you should be glad for such a family is that even renters left land records behind. When a renter died, his children were the first in line to be able to take over the responsibility to the overlord. As children took up where their parents left off, land records were created that can help connect children to parents.
Another record type that is often overlooked but may prove helpful is that of very early censuses. Although they were not as detailed as those we see in more recent times, they still hold valuable information. They may include only heads of household, but that may be just enough to determine where the family is located. Some even include listings of widowers, how long they have been without a spouse, and other details in regard to their married lives. They usually also include ages, which are always helpful in determining the correct ancestor amid the list of patronymic names on the page.
What a sad life it would have been for that couple who had married and not had children. It was important for couples to have children in that time—it meant there was someone to take care of the parents and to take over the responsibilities when they were gone. Well, for those without be extra grateful, because that usually means that you will find really great probates for the husband and wife.
Normally, the probate was mainly to determine guardianship of children, but even if there were no children in the marriage, the probate was still needed to distribute property. The surviving spouse only received part of the possessions. In Denmark the widower received 50 percent, whereas the widow would receive only 30 percent. The rest was divided among their children. This means that if there were no children among whome to divide the remaining possessions, they would go to extended family, usually siblings and their children if they were deceased. This type of probate is definitely a gold mine of information, especially because family relationships were usually given.
You may find yourself feeling discouraged at the plight of your poor ancestors, but remember that with their lowly circumstances they also left "treasure" of a different kind behind for you.