Much of Welsh language poetry has, until quite recently, been composed in various forms of strict metre (canu caeth), latterly with the encouragement of the eisteddfod movement.
It includes as many minor poets as possible to illustrate the range and content of Welsh poetry throughout the ages.
Tradition records: The bulk of surviving verse from the period known as "Canu'r Bwlch" is anonymous.
The list is fairly chronological but not exhaustive as the work of some minor poets of the late 15th and 16th centuries remains in manuscript and a large corpus of late medieval Darogan, prophetic verse, is anonymous or attributed to early poets.
The free verse and strict metre poets sit rather uneasily together in this list.