Mairi's Wedding (also known as Marie's Wedding, the Lewis Bridal Song, or Mairi Bhan) is a Scottish folk song originally written in Gaelic by John Roderick Bannerman (1865–1938) for Mary C. MacNiven (1905–1997) on the occasion of her winning the gold medal at the National Mòd in 1934. In 1959, James B. Cosh devised a Scottish country dance to the tune, which is 40 bars, in reel time.
J. R. Bannerman, who composed the original song, was born in South Uist but left aged seven for Glasgow where he later joined the General Post Office (GPO) as a telegraph boy and rose to become general superintendent. He was brought up in the Glasgow Gaelic community where most social activities were conducted in Gaelic and he developed a lifelong interest in the songs and literature of that culture. His son, John MacDonald Bannerman became a well known Gaelic broadcaster and singer, but better known as a rugby international (37 caps for Scotland; Oxford Blue) and Liberal politician, ultimately being ennobled as John Bannerman, Baron Bannerman of Kildonan.
Winning the Mòd gold medal was (and is) regarded as the highest singing award in Scottish Gaeldom, and Mairi's Wedding was composed to recognise this achievement. A track of Mary C. MacNiven singing her winning song at the 1934 Mòd is still available and the Mod has founded a memorial salver competition to honour her name. Her wedding did not in fact take place until some six years later when she married Captain John Campbell of Glendale, Skye. She continued to sing at Gaelic concerts and céilidhs for most of her life, and died aged 91 at her native Portnahaven, Islay in 1997.
The song "Mairi's Wedding" was first performed for her at the Highlanders' Institute, then in Glasgow's Elmbank Street, and, at that time, a focal point of cultural and social activity for the Highlands and Islands community in the city. It was probably through this performance that Sir Hugh Stevenson Roberton came to know the song.