Leifchild Stratten Leif-Jones, 1st Baron Rhayader, PC (né Leifchild Stratten Jones; 16 January 1862 – 26 September 1939), known as Leif Jones before his elevation to the peerage in 1932, was a British Temperance movement leader and Liberal politician.

In 1867, when Leifchild was five years old, his mother died, and, in 1869, his father left London, for health reasons, moving firstly back to Swansea (1870–1877) and afterwards to Melbourne, Australia (1877–1880), where Leifchild was educated at Scotch College, Melbourne, from 31 July 1877 to December 1878.

[2] In May 1900 he contested the South Manchester constituency in a by-election, losing to the Liberal Unionist candidate.

[8] So that he might continue to be known by the familiar name of 'Leif Jones' he had earlier that month changed his surname by deed poll from 'Jones' to 'Leif-Jones'.

Lord Rhayader died in Marylebone, London, in September 1939, aged 77, when the barony became extinct.