The current spelling of the name Nantmor is more modern – most old documents  from the 16th to the 18th century record the name as Nanmor, although the Ordnance Survey map of 1558 records the name "Nant-y-mor."
The village is perhaps most famous for being the home of Dafydd Nanmor, a renowned 15th century bard (died c. 1490), who took his name from the hamlet, as did Rhys Nanmor after him. Dafydd Nanmor himself was possibly a bardic student of Rhys Goch, who lived at neighbouring Hafod Garegog.
Filmed in Nanmor, or Nantmor near Beddgelert in 1957 the Inn of the Sixth Happiness is a 1958 American 20th Century Fox film based on the true story of Gladys Aylward, a tenacious British maid, who became a missionary in China during the tumultuous years leading up to World War II. Directed by Mark Robson, who received an Academy Award for Directing nomination, the film stars Ingrid Bergman as Aylward and Curt Jürgens as her love interest, Colonel Lin Nan, a Chinese officer with a Dutch father. Robert Donat, who played the mandarin of the town in which Aylward lived, died before the film was released. The musical score was composed and conducted by Malcolm Arnold. The cinematography was by Freddie Young.
Carneddi, a nearby hill farm, was the home of Ruth Janette Ruck, who published a trilogy of books about her experiences in the 1950s, '60s and '70s, namely Place of Stones, Hill Farm Story and Along Came a Llama. In 1980 she featured in the HTV About Britain series in an episode called "The Lady and the Llama", which featured a year on the farm. 
- Biography of Dafydd Nanmor
- Capel Peniel Nantmor
- www.geograph.co.uk : photos of Nantmor and surrounding area