I can't give you an answer on the maiden name, but these are a few comments that might help you along the way:
Will a death record for 1855-1865 show her maiden name? Below are my choice of death records - in case you could direct me to another source that would reveal her maiden name.
Elizabeth Waddington Leeds 9b328 p.81 1858 Oct-Nov-Dec
Elizabeth Waddington Leeds 9b243 June 1865 Apr-May-June
Eliza Waddington Leeds 9b230 p.173 1855
Mary Elizabeth Waddington Leeds 9b287 p.203 1860
It looks as though you have taken these from FreeBMD. If you go to the GRO site (as given by Ladyhawk), the entries also have an age at death, which would enable you to eliminate the second and third in your list. I couldn't find the fourth one, unfortunately.
I've added the 1851 census for anyone else looking to help
Piece 2321
Folio 961
Page number 37
17 Carr Street Leeds
John Waddington 61 Head occ coppersmith
Betty Waddington 67 Wife
Ellen Waddington 34 Daughter
Ann Waddington 3 Daughter
all born Leeds
To expand on this and the latest posts from Ladyhawk, Yorkshire Burials (invaluable for Leeds area research - free to use but you need to register at
https://yorkshireburials.uk/) has the burial of Elizabeth Waddington of Carr Street in 1858 at St Mark's Woodhouse. The entry also links to others buried there, with a photo of the memorial giving several family names. John died in 1853, and then it looks like 3 daughters and one granddaughter. If you haven't already done so, it would be worth searching out the baptisms for these in case they have anything about Elizabeth's maiden name.