William Marshall Selwyn (15 February 1879 – 29 September 1951) was an Anglican suffragan bishop in the 20th century.
[1][2] Selwyn was born into an ecclesiastical family, the second son of the Reverend Sydney Augustus Selwyn, of Boscombe vicarage, Bournemouth, and Ellen Blake.
He was educated at Haileybury and Emmanuel College, Cambridge,[3] before beginning his ordained ministry as a curate at All Saints' South Lambeth.
[4] He was Chaplain of the London Irish Rifles from 1912 to 1917, a period that involved World War I, and was interviewed early in 1918 for a commission as a Temporary Chaplain to the Forces.
Incumbencies as vicar at Holy Trinity, Bournemouth and Brompton, London[7] followed before becoming the Archdeacon of Bath.