Thanks all. I did think the spelling of Maloney might be tricky - but lots for me to look up now. I don't know any Maloney's further back, but this is what I have on John's siblings.
Patrick Maloney - worked in London, went to New York, did not marry.
Richard Maloney - married Hannah, children John (married, had a daughter), Patrick (worked in London, died around 2005) and Kathleen (still in Wexford?)
Sister Maloney - married Power or Powers, sons Patrick (lived in Ammanford, has a daughter in Newport, Wales) and John (was lobster fisherman in Rosslare, sold to London hotels, and had one arm!!)
Might be of interest to other Maloney researchers.