Mr and Mrs Potter

Harry's paternal grandparents are rarely mentioned in the books. However, while looking at a family tapestry in Order of the Phoenix, Sirius states that he stayed with the Potters after running away from home at 16, and they treated him as a second son.

According to J. K. Rowling, James was a pampered, only son, probably because his parents were older when he was born. This may also explain why they only had one child. Both were old when they died, succumbing to a wizarding illness.[12] Their deaths occurred sometime before Voldemort killed James and Lily - 31 October 1981 - as Harry's only living close relatives were the Dursleys at that time. Rowling has also said that Harry's considerable inherited fortune came to him via the Potters.

The Potter family members were pure-blooded wizards up until Harry, who is a "half-blood" since Lily was Muggle-born. Before having children of his own with Ginny Weasley, Harry was the last of the line. Rowling stated that Harry had no living close relatives, apart from the Dursleys, but she also stated that all wizards are inter-related to some degree as they naturally bred together through the centuries.