I have found that mistakes abound (particularly names) in all kinds of records, even OPRs - whether these be in the original records, early transcriptions or more recent ones. With everyone and their cat sharing similar names, it must have been easy for those maintaining the records to muddle the who's who of the various families!! In this case, it may have been a mix-up with her mother's name or who knows, maybe her full name was Isabella Elizabeth Telfor Hamilton!
But I did want to point it out because I had assumed there was a daughter Elizabeth and went looking for her yet the year date only fit Isabella! Per the OPRs, it appears she married a David Muirhead in 1873 so she died only five years into the marriage. As far I can tell they had two children, Robert (1874) and Elizabeth Douglas (in 1878, possibly leading to Isabella's premature death).
And I'll take this opportunity to once again thank you Lodger for the incredibly generous effort you put in to sharing so much information on this forum. I'm a grateful fan! It does seem, at times, that all those 19th century Wishaw/Cambusnethan families were related to each other in some shape or form. At one time you wrote something about 6 digits and webbed toes - I don't know if you were making a random joke, but I really had to laugh because my cousin does kind of have webbed toes!
Cheers!