Chreid [[T. F. O'Rahilly]], áfach, nach raibh an san bhuafhocal ''Riab nDerg'' ná truailliú de ''Réoderg'',<ref>O'Rahilly, lch. 486</ref> ach nár dhaoine éagsúla iad (1=2).
Chreid O'Rahilly, thairis sin, ''thatgurb é Lughaidh Riabh Dearg isionchollú yetarís anothereile incarnationden oflaoch the heroic, mytho-dynastic figuremiotasach [[Lugaid Mac Con]] (3, 1=2=3), closelya associatedbhfuil withgaol thegar aige leis an ndream réamhstairiúil, prehistoricna h[[Érainn]],<ref>O'Rahilly, ll. 201-2</ref> a population of late [[Iron Age]] Ireland who provide Irish legend with its earliest known Kings of Tara. One of their most notable representatives in that office is Lughaidh's immediate predecessor, Conaire Mór.
''O'Rahilly risgoes further: Lughaidh na Riabh Dearg (1) to be the double of Lugaid mac Con Roí (4, 1=4), whose alternativebuafhocal epitheteile was ''mac Trí Con'', and who himself is to some extent identical with [[Lughaidh Mac Con]] (1=2=3=4).<ref>O'Rahilly, ll. 486–7, 79–80</ref> <!--bog: The last, usually known simply as Mac Con "Hound's Son", is an Érainn king matching Conaire Mór in importance in Irish legend. Another is [[Cú Roí mac Dáire]], or simply [[Dáire]],<ref>O'Rahilly, lch. 49</ref> father of Lugaid mac Con Roí. -->
Tá Lughaidh eile ann, sinsear Mhic Con, [[Lugaid Loígde]] (5).
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