For several years I have hit a dead end with one branch of my family tree. My Great Grandfather Edward Buten married by Great Grandmother Elizabeth Mary Ann Dunnington in 1893 at the Islington Registry Office.
The Buten name is so rare, that nearly all records in the UK since 1893 are of members of my family.
Edward Buten's occupation is given as warehouseman/dockworker and his address is 38 Clayton Street, Islington. and was born c. 1861 Paddington, London.
I could not find any mention of Edward in any records prior to 1893, so I did it the old fashion way and looked up the address. Living there in 1891 was Edward Bulen, b. c. 1861 Paddington, Wharf Labourer:

On balance it appears that this is the same person, although married to Louisa.
Did Edward change his name from Bulen to Buten or does this look like a transcription error? How would a professional genealogist proceed and break through this brick wall?