Hi Reets,
I did have a very good look at the parish records some time ago and I think I have connected as best I could.
I think Timothy Riordan and his sister Ellen married brother and sister
Timothy married Ellen Cronin
Issue: 1829 Owen sponsors MIchael Connel and Honora Cotter of Macroom
1832 Bartholomew sponsors Bartholomew Cronin and Mary Murphy
1834 Mary sponsors Cornelius Cronin and Margaret Breen
1837 Ellen sponsors Cornelius Shea and Joan Cronin
1840 Julia sponsors John Buckleyand Mary Creedon
Last three born Masseytown
his sister Ellen and her husband Bartholomew married 22 Jan 1826 Kilnamartyra Witness John Buckley (he was sponsor or Julia Riordan see above) and Daniel Duggan Bartholomew is described as being of Macroom and lived at Masseytown
Issue: 1832 John sponsors Corny Cronin and Johanna Cronin (siblings of Bartholomew?)
1834 Daniel sponsors Corny Cronin and Joan Deasy
1836 Mary sponsors Corny Cronin and Joan Deasy
Looking at John Buckley witness in marriage of Ellen Riordan and Bartholomew Cronin and sponsor of Julia, Timothy Riordan daughter, he maried Catherine Riordan in Macroom 4 Feb 1845
There was a Eugene Riordan and Elizabeth Moynahan of Shannivallishene Kilnamartyra who had children between 1807 and 1827. Eugene is a name that appears in the children of Hannah Riordan and Thomas Daws in Australia as does Cornelius and Ellen.
Thats as far as I have been able to get but I will have a further look.
Cheers
Rosalie