Llunwerth or Llwmbert (fl. c. AD 873) was a bishop of Meneva (modern St. David's) in medieval Wales.
The Annals of Wales and Plumber name him as the direct successor to Bishop Nobis,[1] [2] while the diocese itself places him at a remove of eight successors.[3] He is recorded in the Book of Llandaf as a contemporary of Tewdwr ab Elisedd, king of Brycheiniog.[2]
The Annals of Wales record him serving for an improbable 65 years.[1]
He is sometimes known as Llunwerth II to distinguish him from an earlier bishop of the same name.