Formed in 1966, this Welsh group was fronted by Frank Hennessy (b. 2 February 1947, Cardiff, Wales; guitar, vocals), the other two members were Dave Burns (b. 4 November 1946, Cardiff, Wales; mandolin, guitar, vocals), and Paul Powell (b. 1946, Cardiff, Wales; banjo, vocals). Initially they played folk clubs, and took up performing full time in 1968. During the following year, the trio lived and worked in Eire. On their return to Wales, the Hennessys began to broadcast with BBC Wales. Their first release, Down The Road, on the Cambrian label, appeared in 1969. Spending time researching Welsh traditional material, they released a number of singles and EPs including Ar Lan Y Môr (1970), Yr Hennessys (1971), Great Little Trains Of Wales (1971), Who Will Cast A Stone (1972), Rhyddid Yn Ein Can (1973), and were given a residency on BBC television’s folk programme The Singin Barn.
In 1972, founder member Powell left the group. Tom Edwards (double bass) joined in 1979, and continued with the group until 1991, when he had to retire through ill health. The line-up was augmented by the addition of Iolo Jones (b. 12 February 1955, Plymouth, Devon, England; fiddle). The Hennessys still tour, mostly concerts and promotional work for the Welsh Tourist Board and British Tourist Authority. Dave Burns also runs Wobbly Records, which released his Last Pit In The Rhondda. The group retained a great deal of popularity, despite their relatively sparse output. Edwards retired from performing in 1991. Iolo Jones also performs with folk group Ar Log.