The Martyrology of Oengus devotes its entire entry for December 9 to the praise of two daughters of Oilill (Ailill) whom it describes rather beautifully as ‘the two suns of the east of Liffey’:
9. Comely are the two daughters of Ailill,
who is not to be concealed:fair is the host of their day –the two suns of the east of Liffey.
9. the two maidens, i.e. Mugain and Feidlimid: in Cell ingen n-Ailella (* the church of Ailill’s daughters’) in the west of Liffey they are, beside Liamain.
of Ailill, i.e. son of Dunlang, king of Leinster, was their father, and in Cell Ailella in the east of Mag Lifi sunt simul Mugain and Liamain.
In Cell ingen Ailella in Mag Laigen they are.
Thereafter Patrick went to Naas. The site of his tent
is in the green of the fort, to the east of the road, and
to the north of the fort is his well wherein he baptized
Dunling’s two sons (namely) Ailill and Illann, and
wherein he baptised Ailill’s two daughters, Mogain and
Fedelm; and their father offered to God and to Patrick
their consecrated virginity. And Patrick blessed the
veil on their heads.
W. Stokes, ed.and trans., The Tripartite Life of Patrick, Part 1 (London, 1887), 185.
It seems from Ó Riain’s research that Mughain was the more important of the pair as her name occurs in other sources and she was also remembered on December 15, the octave of this feast, at Cluain Boireann, which may now possibly be identified with Cloonburren in Roscommon.
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