Michael Llewelyn Davies was – along with his four brothers – the inspiration for J. M. Barrie's characters Peter Pan, the Darling brothers, and the Lost Boys. Late in life, his only surviving brother Nico described him as "the cleverest of us, the most original, the potential genius." He died in ambiguous circumstances, drowning with a close friend – and possible lover – just short of his 21st birthday. He was a first cousin of English writer Daphne du Maurier.

The Davies boys were the inspiration for the stories of Peter Pan by J. M. Barrie, in which several of the characters were named after them. They were the sons of Sylvia (1866–1910) and Arthur Llewelyn Davies (1863–1907). Their mother was a daughter of French-born cartoonist and writer George du Maurier and sister of actor Gerald du Maurier, whose daughter was author Daphne du Maurier. Their father was a son of preacher John Llewelyn Davies, and brother of suffragist Margaret Llewelyn Davies.