Thank you very much for your query to Ireland Reaching Out. Could you please post your message on the Rathdrum parish profile page here: http://www.irelandxo.com/group/rathdrum-wicklow and also on the the County Cork profle here: http://www.irelandxo.com/group/county-cork
If the families were Catholic, then there might be records available for their baptism and marriages. The Rathdrum baptism records start from 1795. Try contacting the parish priest in Rathdrum for information. They should have records for you, as you already have some details on their children. The National Library of Ireland may have information also: Reference Pos.6476
I would also suggest checking land records such as the Tithe Applotment Books (1823-38) for information.
Best of luck in your research!