Local land records are not just deeds involving property transfer between grantors and grantees. They may contain court orders that impact property title (such as partitions), affidavits (from heirs or others testifying to certain aspects of property title), contracts (to purchase a piece of property or between two individuals with their own property preparing to marry), etc.
Occasionally someone who never bought or sold property can appear in a document recorded with the land records. An uncle of mine filed an affidavit in the 1890s after his father died stating that there was no debt on the property and that all his father’s last bills had been paid). The son did not sell the property, but filed the affidavit because the family had not gone through a probate and wanted to state the the property was free and clear because the father’s debts had been paid.