The genealogy shown below, is a Welsh version of King Arthur’s family. The names show here were found in the Welsh collection of tales and poems, found in mainly the Mabinogion. However, I had also used other sources such as from the Black Book of Carmarthen, the Book of Taliesin, and others.
I have used the Welsh names instead of the names we usually associated with the Arthurian legend.
To see other family trees of Arthur, go to House of King Arthur.
According to a number of later Welsh texts, on both lines of Arthur’s parents, Arthur was a descendant of two Welsh gods: Llyr and Bran, Llyr’s son. I have not see these texts, but I thought I might mentioned them any if you are interested in finding out yourself. These manuscripts are: Bonedd y Arwyr, Mostyn MS 117, and two conflicting genealogies in Bonedd yr Arwr.
There are a few names I am not certain of.
In the Welsh Triads, Arthur was married to three queens, all of them were named Gwenhwyfar (Guinevere), but each had different father. None of the tales in the Mabinogion mentioned which was her father.
Custennin appeared as the shepherd in tale of Culhwch and Olwen, as Culhwch’s uncle. Here, he was the father of the hero Goreu. In the Welsh romance, Gereint and Enid, Gereint (Erec) was the son of Erbin, who was the son of Custennin. I am not certain if they were the same Custennin, or two different figures with the same name.