Bláthnat's floral name and the story of her conspiracy have been compared to those of Blodeuwedd in the Fourth Branch of the Mabinogi, Math Uab Mathonwy.
The theme of Maponos son of Matrona (literally, child of mother) and the development of names in the Mabinogi from Common Brythonic and Gaulish theonyms has been examined by Hamp (1999), Lambert (1979), and Meid (1991).
It follows three main characters who find themselves moving from their world in West Wales to the setting of the tales of Welsh mythology known as the Four Branches of the Mabinogi (Welsh: Pedair Cainc y Mabinogi, often referred to as simply Y Mabinogi), from which the film's title is derived.