Applying the same criteria to Ada BELLAMY as I did to Blanche BELLAMY, I searched the England and Wales Census 1901. I could not find an entry for Ada GREAVES and just one entry for Ada BUTTERY.

Ada Buttery, 27, Sheffield, Yorkshire

The recorded age of 27 years for Ada BUTTERY corresponds with that of Ada BELLAMY, so for the time being I think I can assume that John Elizabeth BUTTERY is a transcription mistake, or a use of 'Elizabeth' that I have not come across before.

Updates:
2005-12-15 Further research has shown this data is probably NOT linked to my family. This data may prove useful to other researchers so I will retain it.