[3] The 17th-century scholar John Colgan believed that a Life written for them had been witnessed in c. 1490 by Cathal Óg Mac Maghnusa (d. 1498), whom he regarded as the author of additions to the Félire Óengusso (see below).
[5] They appear anonymously by that description in the Félire Óengusso, while a late commentator to the text, often identified as Cathal Óg Mac Maghnusa, names them Eithne and Sodelb.
[13] The commentary to the Félire states that they had a vision in which they "used to nurture Christ [...] and Christ used to come in the shape of a babe", so that he was lovingly cradled in their bosom and kissed (in sinu earum et osculabantur eum, et ille babtizauit eas et si apostoli praedicauerint illis tamen plus ab ipso acceperunt fidem quam ab illis).
[6] The church or hermitage of the two sisters is identified by the commentator of the Félire as Tech ingen mBóiti "House of the Baite's daughters" near Swords,[6] i.e. in the barony of Nethercross (County Dublin), which the Martyrology of Cashel locates in Fingal, on the plain of Brega.
[8] In one of the legends contained in the Acts of St Moling, Bishop of Ferns, it is told that this venerable saint visited Eithne and her sister.