Tom Smith quoted Kevin Murray on this piece yesterday and I thought Aed
Engach was discussed in that piece. However, on re-reading it, I notice it
is just a mention.
Aed Engach is the classical "prophesied one" (an Tairngertach) rather than
an actual king. Breandán Ó Buachalla has dealt with him in his 'Aodh
Eangach and the Irish king-hero" in Ó Corráin et al (edd) Sages, Saints and
Storytellers. That was 1989 and I don't know if there has been anything
else since. There would quite likely be discussion elsewhere in KM's
article or in the edition of Baile in Scáil (available yet?).
BÓB states that Baile in Scáil is the first mention of him, so this might
well be the second. He lasted as the Tairngertach in the bardic poetry
right up to the end of the seventeenth century when Ballderg Ó Domhnaill was
painted as the Aodh Eangach who would return from Spain to do ...