The sheriff's office checked a report from a former resident who thought the unidentified woman might have been a friend, with a son in prison.
Ike made landfall Sept. 13, 2008. The woman's body was found 16 days later on Pelican Island.
Sheriff's spokesman John Florence says her left foot is webbed between the second and third toes. She's about 5 feet tall and wore gray beads on her left ankle.
Ike is blamed for more than three dozen deaths.