Áedán mac Gabráin
The poem goes on to relate that Echu's wife, named Feidelm agreed to exchange one of her twin sons at birth for one of the twin daughters of Gabran so that Gabran could have a son. These boys were Brandub mac Echach (died 603) and Áedán mac Gabráin. The date of the poem coincides with a period of Scottish and Leinster cooperation and could be political propaganda. A foster-brother relationship may be implied. Echu's son Brandub would go on to become King of Leinster and halt the expansion of the southern Ui Neill.