Arwyn Randall Davies, Baron Arwyn (17 April 1897 – 23 February 1978) was a Welsh Labour life peer Married to Norah Davies, with children the Honourable Elizabeth Macnab, the Honourable Mary Webb (deceased) and Hugh Davies.
Davies took the name of Arwyn in lieu of that of Davies by Deed Poll on 14 December 1964.On 29 December 1964, he was created a life peer as Baron Arwyn, of Glais in the County of Glamorgan.