Aldroen ap Selyf

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Aldroen ap Selyf, King of Brittany

French: De Bretagne, King of Brittany
Also Known As: "Aldrien", "Aldroenus", "Aldrienus", "Audren/Aldraenus: 4th King of Brittany", "ruled 445-490"
Immediate Family:

Son of Salomon I ap Gradlon, King of Brittany and Flavia
Husband of [Junia] d' Auxerre, Rusticus and Ester, d' Auxerre, Rusticus
Father of Budic ap Aldroen, Emyr Llydaw; Yspwys Yspwch ap Aldroen; Erich ap Aldrien, Duke of Brittany; Judicael . ap Aldrien and Bigan Farchog ap Aldrien
Brother of Constantine Waredwr "the Deliverer" ap Selyfan, King of Britain; Selyfiaun ferch Selyf and Grallon ap Salamon

Managed by: Gene Daniell
Last Updated:

About Aldroen ap Selyf

Please see Darrell Wolcott: Who Was Yspwys in Welsh History?; (Steven Ferry, September 30, 2022.)

Please see Darrell Wolcott: The Family of Emyr Llydaw; (Steven Ferry, October 7, 2022.)


Aldrien, King of Brittany

(c.AD 373-464)

(Welsh-Aldwr, Latin-Aldroenus, English-Aldron)

Aldrien was Gradlon Mawr's grandson, who reigned after his little-known father, 'King' Salomon I. He appears, on occasion, to have been called Daniel. As the heir of Eudaf Hen's nephew, it was to the young Aldrien that Gwithilin, the Archbishop of London, travelled with a deputation to offer him the British High-Throne. There had been no monarch in Britain since the Emperor Gracian's death, and in 410 the Roman army and administration had decided to completely withdrawal back to Rome. Aldrien was aware of the chaotic state of the country, and of the damage incurred from invading Picts, Saxons and Irish. He was, therefore, unwilling to take on the kingdom but sent his brother, Constantine, in his place, with two thousand armed men to secure the throne. Aldrien died some fifty years later, in 464, having married the sister of St. Garmon, Bishop of Man and produced, by her, at least four sons: Budic I, Erich, Judicael and Bican. He was succeeded by the former.

Generally considered legendary.

King of Brittany Aldrien ap Selyfan of Brittany1

b. circa 373, d. 464

Father High King of Brittany Salomon I ap Gradlon of Brittany1 b. circa 355, d. 446

Mother N. N. filia Patricius Flavius1 b. circa 355

    Also called Audren.2 Also called Alain.2 King of Brittany Aldrien ap Selyfan of Brittany was the brother of King of the Britons Constantine ap Solomon of Britain; the brother of Aldroen, King of Lesser Britain.3 King of Brittany Aldrien ap Selyfan of Brittany was born circa 373.1 He was the son of High King of Brittany Salomon I ap Gradlon of Brittany and N. N. filia Patricius Flavius.1 King of Brittany Aldrien ap Selyfan of Brittany married N. N. of Ireland before 420.1 King of Brittany at France before 464.1 King of Brittany Aldrien ap Selyfan of Brittany died in 464.1,2


N. N. of Ireland b. circa 400


King of Brittany Budic I ab Aldrien of Brittany+ b. c 4201

King of Brittany Erich ab Aldrien of Brittany+ b. c 425, d. 4781


[S266] EBK, online

[S278] DfAdam, online unknown url, The Line of Caradoc, Lord of Meiriadog, 77.

[S624] Geoffrey of Monmouth, Geoffrey of Monmouth, Book VI, Chapt. 4.