Derfel (Welsh pronunciation: [ˈdɛrvɛl]) may refer to:
- Saint Derfel, 6th century British monk and reputed follower of King Arthur
- Derfel Cadarn, fictionalized version of the above
- Robert Jones Derfel, Welsh poet and political writer
- Derfel, a German and Welsh surname.
See also
edit- Derf, people with the given name
- Derfel Limestone, a geologic formation in Wales