Robert Williams (1810–1881), was a scholar of Middle Welsh, best known for his Selections from the Hengwrt MSS. in two volumes.
- Williams, Robert (Ed., Trans.) & Jones, G. Hartwell (Trans.). (1876). Selections from the Hengwrt MSS.: Preserved in the Peniarth Library (Vol. I: Y Seint Greal, being the adventures of King Arthur’s Knights of the Round Table, in the quest of the Holy Greal, and on other occasions). London: Thomas Richards. [Welsh text: pp. 1–433; English translation: pp. 435–720].