An American novelist and playwright wrote The Long Christmas Dinner. Him and Richard Llewellyn both have the profession as novelist in common.
Thornton Niven Wilder (April 17, 1897  December 7, 1975) was an American playwright and novelist. 
Richard Dafydd Vivian Llewellyn Lloyd (8 December 1906  30 November 1983), known by his pen name Richard Llewellyn, was a British novelist. 
The Long Christmas Dinner is a play in one act written by American novelist and playwright Thornton Wilder in 1931. 
