Ifor Bach (meaning Ivor the Short) (fl. 1158) also known as Ifor ap Meurig and in anglicised form Ivor Bach, lord of Senghenydd, was a twelfth-century resident in and a leader of the Welsh in south Wales.
At this period the Normans had conquered England, but large areas of Wales were still under the control of the native Welsh Princes and Lords. Whilst parts of the old Welsh Kingdom of Morgannwg (which was to become Glamorgan) had fallen to the Normans, Ifor ap Meurig held land in Senghenydd, a region of Morgannwg which had not yet fallen completely. Broadly Senghennydd was the upland area bounded by Brecknock to the north, between the River Taff and the Rhymney River and abutting Cefn Onn in the south.
The Norman Lord of the region was William Fitz Robert, 2nd Earl of Gloucester.
In 1158 he attacked and killed Morgan ab Owain, Welsh Lord of Caerleon and Gwynllwg (anglicised as Wentloog).
According to Giraldus Cambrensis in the Itinerarium Cambriae, in 1158 Ifor Bach was a tenant of William, Earl of Gloucester, who held Cardiff Castle. Gloucester was trying to take land which under Welsh law belonged to Ifor.
Clwb Ifor Bach (English: Little Ivor's Club, Welsh pronunciation: [ˈklʊb ˈivɔr ˈbaːχ]) is a Cardiff nightclub, music venue, Welsh-language club and community centre. It is known to the Cardiff Welsh-speaking community as Clwb (English: Club) and is often known by others on the Cardiff music scene as The Welsh Club.
Clwb Ifor Bach is used as a social centre by Welsh speaking people in Cardiff, as well as by many non-Welsh speakers. Until recent years, the club had a number of regular members only nights. This policy has been discontinued. Clwb Ifor Bach is the focal point for many Welsh-medium organisations and events in the area: social, educational, sporting and otherwise. English and Welsh are spoken equally throughout the club, and most staff are required to be bilingual. No anti-Welsh sentiment is tolerated in the club.
Clwb Ifor Bach is located in central Cardiff, halfway down Womanby Street, a lane running from the front of Cardiff Castle, parallel to High Street/St Mary Street). At either end of Womanby Street are The City Arms, opposite the Millennium Stadium, and Dempsey's Irish Bar, opposite the castle. The club faces the rear of the Wetherspoons pub 'The Gatekeeper'.