I could not find her marriage record in Rathcormac but marriage records for the parish start in 1829 so she may have been married there prior to 1829.
The 1855 Griffiths Valuation head of household listing for Kilmanaheen civil parish (which includes Ennistymon) does not show a James Finn record http://www.failteromhat.com/griffiths/clare/kilmanaheen.htm possibly he died before 1855.
I aslo did not see James Finn in the 1826 Tithe listings.
Here is a link to the online resources for Kilmanaheen parish on the Co. Clare library site.
Do you know if Honora died 1864 or later?