Marchell was the mother of Brychan by Anlach, a king ruling in Ireland.
|Gen.||CB 10 seg.
||DSB 10||JC 1 seg.|
|-7||Annun nigri||Annhun||Annwn du|
Morris points that Marchell’s father, Tewdrig, bears a Germanic name, that is Theodoric as does her grandfather, Teithfallt which derives from Theudebald. He also suggests her grandfather’s name, Teidhrin, may have evolved from Theodhere. It may well also be that Marchell’s name, rather than being a variant of L. Marcella, is related to the Germanic Marshall. If this family is truely Germanic in origin, the question arises who was the founder, Annun Ddu. Bartrum points out that HG 16, which is a list of Roman emperors, places an “Antun du & Cleopatre” in between the earlier Valerian and the later Aurelian. The former emperor’s rule ended in 260 and the latter’s started in 270. Chronology thus indicates identifying Annun with Mark Antony is wrong. The intervening decade was during the Gallic empire which included Britain and was a rift that occurred within the Roman empire.
It may well be that an Antonius Niger was one of the usurpers during this period. That Annun Ddu was of gen. -7 lends support to this identification.
 Morris, J., 1995, Vol. 1, 49.
 Morris, J., 1995, Vol. 3, 167.
 Koch, J.T., 2006, 301.
 Bartrum, P.C., 2009, 21.