http://www.rootschat.com/forum/index.php?topic=380128.msg3459739;topicseenThere are several Killybegs in Ireland eg south co Donegal coast, {Mountcharles is about 20 miles east} another much smaller district is called Killybegs around a crossroads in Slaght Slatt Sleaght townland, Connor civil parish nr Ballymena Co Antrim. I thought I had also seen such a name in Co Down but sorry my memory doesn’t recall
Leneghan I was surprised to find no homesteads in 1857-65 in Co Donegal useing
www.askaboutireland.ie/griffith-valuation/index There are plenty in other counties, I did find a
James Mclenaghan, in Townland Eleven Ballyboes In Parish Moville, Lr
Samuel Mcclenaghan n Townland Ballylawn In Parish Moville, Ur
I started to look for other variations of the spelling eg in Co Down the spellings include LANAGAN LENAGHAN LANIGAN LENIHAN LENNAGAN LENEHAN LENHAN LINAGHAN LENEGHAN LENNOGHAN etc what this little exercise showed me, was I was missing any of the mountcharles surname in 1857. I found 8 in the 1901 census all living in
Drumgornan or Drumgorman, which probably includes Mountcharles etc and back in 1857 in Griffiths there is a Hugh Lenahan in the civil parish of
Killymard. His homesteads boundaries will be findable on this Griffiths website under maps, you will need patience to find it, but its worth it. I didn’t try other spellings on Griffiths
That’s all I can offer good luck, Jim