I haven't been on this site for ages as it seemed to go quiet, but I'm a descendant of Charles McElholm and Anne Carleton (my great grandparents). My grandfather was John McElholm and he married my grandmother Margaret Brown fairly late in life (for those days - he was 39 or so!). They lived in Ederney and I have found info on the censuses of 1901 and 1911, where Anne Carleton lived with her 3 adult children in Edenclaw Little. I guess Charles must have died by 1901. I don't have too much more info than that - my McElholm relatives now live in Scotland (I'm in New Zealand).
Do you have a Facebook account? There is a group of us McElholms on there - most of them live in Ireland. Hope to see you there sometime. Here is the link: https://www.facebook.com/groups/116182701760399/
Kind Regards, Anne Kerslake (nee McElholm)