Wondering if the two 1890 marriage references have anything to do with spelling of Isabella's name. Although both references list 'Isabella Witherow' the index in Irish Genealogy database have 2 marriages listed for Hugh Montgomery Knox- Isabella Witherow and Isobella Witherow.
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I've seen that sometimes where a name is indexed under two alternate spellings.. but in the cases I've come across these both have the same index references
Shane
I think it is misspelt by whoever wrote the records. My mother (a Witherow by descent) is Joceline Isobel and I can't tell you how many discussions we've had about the spelling of her name. Jocelyn is the masculine spelling and Joceline the feminine and Isobel can be spelt either way so whoever read the records and typed them up might have not known if it was an o or an a ...