While Deborah and Ivor Rogers argued in J.R.R. Tolkien: A Critical Biography (1982) that the Green Brother represented "the embodiment of ancient springtime fertility myths" (suggestive of the Green Knight), Kris Swank has suggested that the Green Brother:
might have been Tolkien’s explanation to his children why Victorian pictures of Father Christmas showed him wearing green robes. Grandfather Yule, whose name is also Nicholas ‚after the Saint‛ (FCL 39), might, then, refer to the pre-Victorian image of the mid-winter spirit
The Green Brother would thus in the latter's interpretation rather be a Christmas figure than a summer figure.
- J.R.R. Tolkien, Baillie Tolkien (ed.), Letters from Father Christmas, "Christmas 1930"
- J.R.R. Tolkien, Baillie Tolkien (ed.), Letters from Father Christmas, "December 23rd 1931"
- J.R.R. Tolkien, Baillie Tolkien (ed.), Letters from Father Christmas, "December 23rd 1932"
- Kris Swank, "The Hobbit and The Father Christmas Letters", in Mythlore 123, 2013, p. 139-140.
- Janet Brennan Croft, David Bratman, "Father Christmas Letters" dated 24 December 2016, Mailing list for the Mythopoeic Society (accessed 2 January 2017)
|The world of the Letters from Father Christmas|
|Main characters:||Father Christmas · North Polar Bear · Ilbereth|
|Other characters:||Mr Cave Bear · Green Brother · Grandfather Yule|
Man in the Moon · Paksu & Valkotukka · Snow Man
|Races & Peoples:||Goblins · Green elves · Red Elves · Snow-elves · Snow-men|
|Other concepts:||Arktik · Goblin Alphabet · Windbeam|