Abstract: This article takes a fresh look at how the memory of the ‘Old North’ was used and reshaped in early medieval Welsh sources. Although their value as historical evidence for the northern kingdoms is uncertain, these sources give us precious insight into how early Welsh writers perceived themselves as a people. Focusing on Historia Brittonum and Armes Prydein Vawr this study demonstrates the multiplicity of memories of the ‘Old North’ in early medieval Wales, with writers freely adapting the past to their present ends.