From The London Encyclopaedia, edited by Ben Weinreb and Christopher Hibbert:
In 1536 Anne, the baby daughter of a clothworker, William Hewett, fell from [London Bridge] into the river but was rescued by an apprentice named Edward Osborn. By the time Anne was of marriageable age her father had become a wealthy man. All her suitors were discarded in favour of Osborn who eventually became Lord Mayor of London.
Found during a search for Thomas Norris, printer and bookseller, who had his shop on London Bridge.