Linfred of Stinchcombe (also known by the nickname the Potterer) was a twelfth-century wizard and pioneering potioneer, credited with inventing many medicinal potions. He was the founding patriarch of the Potter family and the Waterman family.
In the 12th century, Linfred lived in the village of Stinchcombe, Gloucestershire, where he had a reputation as an eccentric, absent-minded man. Nonetheless, his helpful nature and affability made him universally liked, and his Muggle neighbours often came to him seeking remedies for their ailments. He readily brewed potions for them using ingredients from his garden. They remained unaware that Linfred's remedies were magical, and thus continued thinking of him as just a strange, lovable man who enjoyed "pottering about in his garden with all his funny plants." This lead to him being given the nickname "the Potterer," which, over the years, was corrupted into simply "Potter."
As his neighbours did not know he was a wizard, Linfred was able to conduct experiments in peace, inventing a number of medicinal potions (including ones which later developed into Skele-Gro and Pepperup Potion). He sold these potions to fellow witches and wizards, amassing great wealth in the process.
Linfred fathered seven children. He left each of them a significant amount of gold upon his death. His eldest son, Hardwin, married Iolanthe Peverell. His eldest daughter, Helinthia, married Antelonius Waterman.