Anlawdd Wledig is unusual because medieval literature gives him almost no independent narrative. The Welsh Classical Dictionary records Amlawdd as the common spelling, with Anlawdd also occurring, and identifies the figure as legendary. An early form, Anblaud, appears in the Life of Saint Illtud as a king of Britain whose daughter is in the saint's ancestry. The title wledig is a Welsh epithet associated with rulers or territorial leaders. Nothing comparable to a reign narrative, battle record or contemporary biography survives for Anlawdd himself.

His clearest Arthurian connection appears in Culhwch and Olwen. Goleuddydd, the mother of Culhwch, is explicitly called the daughter of Anlawdd Wledig. When Culhwch later comes to Arthur's court, he is identified as Arthur's first cousin. The tale does not explain the entire genealogy, but later Welsh material supplies the expected connection by making Arthur's mother Eigyr, the Welsh form behind Igraine, a daughter of Amlawdd Wledig. In that genealogical tradition, Anlawdd becomes the maternal grandfather of both the line leading to Arthur and the line leading to Culhwch.

Other traditions expand the family. The Welsh Classical Dictionary notes that an unnamed daughter is inferred as the mother of Goreu fab Custennin, another important figure in Culhwch and Olwen. Medieval genealogical texts also attach daughters such as Tywanwedd and Gwyar to Amlawdd, although the exact relationships vary across manuscripts and should not be treated as one perfectly consistent family tree. These additions show how the figure became a useful genealogical anchor: writers could connect heroes, saints and dynasties by making their mothers daughters of the same legendary ruler.

That function is more secure than attempts to reconstruct Anlawdd as a historical king. The suggestion that he may have ruled in or near Ergyng comes from later genealogical connections, not from a contemporary record of his kingdom. Likewise, proposed marriages and extended pedigrees differ across sources. The safest description is therefore a legendary territorial ruler whose name was used to organise kinship in medieval Welsh tradition. This also explains why he can be important without ever appearing as an active character in an Arthurian adventure.

For Mythopouch, the strongest associations are the relationships that are both central and already reflected in Welsh Arthurian tradition: Goleuddydd, Culhwch, Igraine and Arthur, together with Goreu fab Custennin. They demonstrate why Anlawdd matters. He is not remembered for a sword, a quest or a kingdom securely located on a map; he is remembered because medieval genealogy places him at the root of a network of heroes. His record is therefore best understood as a Legendary person whose significance is genealogical rather than biographical.