Thank you very much for your query. Looking at the parish name, I would suggest that the correct name is Toomore. You should post your message here on the Virtual Parish Profile (VPP): http://www.irelandxo.com/group/toomore-mayo Even though the VPP is not yet active, you can still post your message. Someone from the community will answer your query in time.
In the meantime, keep checking the IRO website.