Feldelm Foltchain ingen Briuin - Parents????

https://en.wikipedia.org/wiki/Bri%C3%B3n_mac_Echach_Muigmed%C3%B3in

Brión mac Echach Muigmedóin

Brión (or Brían), son of Eochaid Mugmedón, was a legendary and possibly historical Irish king, fl. 4th/5th century.

http://fabpedigree.com/s041/f750950.htm

@Brion of Ireland
Gender: Male
Birth: 465
Leinster, Ireland
Immediate Family:
Son of Eochaid Mugmedon Na Leinster ("Lord of Slaves") and Cuach Na Leinster (Ui Bairrche)
@Inne Cairenn Chasdubh
Father of Feldelm Foltchain ingen Briuin
Added by: <private> Patin on March 15, 2014
Managed by: James Fred Patin, Jr., Jeanne Ray (Foy) and Hannah Mojave Brewer

Are they possibe a variation - made up profiles for?

@Brion mac Echdach (Lebor Gabála Érenn)

@Rossa ingen Cathair, {Legendary, Lebor Gabála Érenn}

Brion of Ireland's birth date as 465 is after his daughter's given as 450