Michele, I have always considered Hannah and Ann/e as synonymous much the same as Bob for Robert, the only difference is that Ann/e is often a baptism name (unlike Bob). Therefore it is quite common to see the 2 names interchanged in a parish register for a Hannah, less likely for someone baptised Ann/e. As to Census their 'known' name is usually the one recorded but rarely a real nickname e.g. junior. Bob