"Bryan O'Lynn", in Gaelic "Briain Ua Rloinn", is an Irish comic song in E minor and 6/8 time. This is not the same tune as the Dorian mode double jig of the same name. Bryan O'Lynn is probably the Irish version of the Sottish song "Tom o' the Linn". Other variants of "Tom o' the Linn" are "Tom O'lin", "Thom of Lyn", "Tamlene" or "Tam Lin". The oldest printed version may be in Ritson’s The North Country Chorister (1802). The Tom a lyn character is related to Tom Thumb, the English version of the trickster dwarf that appears in stories throughout Europe. Some versions of this are considered to be a children's song. There are multiple versions of the tune, some eight measures and some sixteen measures long. In the nineteenth century it was printed and sold on broadside sheets. It was printed in Reeves' The Everlasting Circle (1960), Baring-Gould's Songs of the West (1913), Huntington's Sam Henry’s Songs of the People (1990) and Roud and Bishop's The New Penguin Book of English Folk Songs (2012). It was recorded by Eliza Pace of Hyden, Leslie County, Kentucky (1937) (as Tom Boleyn), Jack Fuller of Laughton, near Lewes, Sussex (recorded by Peter Kennedy as Briny O’Then), (1952), Thomas Moran of Mohill, County Leitrim, sang Brian O’Lynn to Séamus Ennis in 1954, Séamus Ennis on A Jug of Punch: Broadside Ballads Old and New (1960), Jim Porter on Just Another Saturday Night (1965) and Jim Eldon on I Wish There Was No Prisons (1983).