first language and some people in west Belfast also speak Irish, especially in the "Gaeltacht Quarter". The dialect of Irish most commonly spoken in Ulster (especially throughout Northern Ireland and County Donegal) is or Donegal Irish, also known as or Ulster Irish. Donegal Irish has many similarities to Scottish Gaelic. Polish is the third most common language. Ulster Scots dialects, sometimes known by the neologism Ullans, are also spoken in Counties Down, Antrim, Londonderry and Donegal. History Early history Ulster is one of the four Irish provinces. Its name derives from the Irish language Cúige Uladh (), meaning "fifth of the Ulaidh", named for the ancient inhabitants of the region. The province's early story extends further back than written records and survives mainly in legends such as the Ulster Cycle. The archaeology of Ulster, formerly called Ulandia, gives examples of "ritual enclosures", such as the Giant's Ring near Belfast, which is an earth bank about 590 feet (180 m) in diameter and 15 feet (4.5 m) high, in the centre of which there is a dolmen. The Boyne and its tributary the Blackwater were the traditional southern boundary of the province of Ulster and appear as such in the Táin Bó Cúailnge. According to historian Francis John Byrne the Ulaid 'possibly still ruled directly in Louth as far as the Boyne in the early seventh century' when Congal Cáech made a bid for the kingship of Tara. In 637, the Battle of Moira, known archaically as the Battle of Magh Rath, was fought by the Gaelic High King of Ireland Domhnall II against his foster son King Congal Cáech of Ulster, supported by his ally Domhnall the Freckled (Domhnall Brecc) of Dalriada. The battle was fought near the Woods of Killultagh, just outside the village of Moira in what would become County Down. It was allegedly the largest battle ever fought on the island of Ireland, and resulted in the death of Congal and the retreat of Domhnall Brecc. In early medieval Ireland, a branch of the Northern Uí Néill, the Cenél nEógain of the province of Ailech, gradually eroded the territory of the province of Ulaidh until it lay east of the River Bann. The Cenél nEógain would make Tír Eóghain (most of which forms modern County Tyrone) their base. Among the High Kings of Ireland were Áed Findliath (died 879), Niall Glúndub (died 919), and Domnall ua Néill