www.freebmd.org.uk indicates that Anna Maria died in the 4th quarter of 1854 at Bethnal Green, London. She does not appear in the 1851 census.
An application for a death certificate might help you. If would give the date of birth if known. It would also name the person who reported the death. If Anna died as a child the informer might well be a parent.
You don't say if you have other info related to your enquiry so I hope this helps.