 The long @-@ standing traditional view , once widely accepted , is that Celtic language , Ogham script and culture were brought to Ireland by waves of invading or migrating Celts from mainland Europe . This theory draws on the Lebor Gabála Érenn , a medieval Christian pseudo @-@ history of Ireland along with the presence of Celtic culture , language and artefacts found in Ireland such as Celtic bronze spears , shields , torcs and other finely crafted Celtic associated possessions . The theory holds that there were four separate Celtic invasions of Ireland . The Priteni were said to be the first , followed by the Belgae from northern Gaul and Britain . Later , Laighin tribes from Armorica ( present @-@ day Brittany ) were said to have invaded Ireland and Britain more or less simultaneously . Lastly , the Milesians ( Gaels ) were said to have reached Ireland from either northern Iberia or southern Gaul . It was claimed that a second wave named the Euerni , belonging to the Belgae people of northern Gaul , began arriving about the sixth century BC . They were said to have given their name to the island . 
 The long @-@ standing traditional view , once widely accepted , is that Celtic language , Ogham script and culture <a href='uninflect' title='1'><mark>were</mark></a> brought to Ireland by waves of invading or migrating Celts from mainland Europe . This theory <a href='uninflect' title='2'><mark>draws</mark></a> on the Lebor Gabála Érenn , a medieval Christian pseudo @-@ history of Ireland along with the presence of Celtic culture , language and artefacts found in Ireland such as Celtic bronze spears , shields , torcs and other finely crafted Celtic associated possessions . The theory <a href='uninflect' title='3'><mark>holds</mark></a> that <a href='dey_it' title='4'><mark>there</mark></a> <a href='uninflect' title='5'><mark>were</mark></a> four separate Celtic invasions of Ireland . The Priteni <a href='uninflect' title='6'><mark>were</mark></a> said to be the first , followed by the Belgae from northern Gaul and Britain . Later , Laighin tribes from Armorica ( present @-@ day Brittany ) <a href='uninflect' title='7'><mark>were</mark></a> said to <a href='been_done' title='8'><mark>have</mark></a> invaded Ireland and Britain more or less simultaneously . Lastly , the Milesians ( Gaels ) <a href='uninflect' title='9'><mark>were</mark></a> said to <a href='been_done' title='10'><mark>have</mark></a> reached Ireland from either northern Iberia or southern Gaul . It was claimed that a second wave named the Euerni , belonging to the Belgae people of northern Gaul , began arriving about the sixth century BC . They <a href='uninflect' title='11'><mark>were</mark></a> said to <a href='been_done' title='12'><mark>have</mark></a> given their name to the island . 
Da long @-@ standing traditional view , once widely accepted , is dat Celtic language , Ogham script and culture was brought to Ireland by waves of invading or migrating Celts from mainland Europe . This theory draw on the Lebor Gabála Érenn , a medieval Christian pseudo @-@ history of Ireland along with tdapresence of Celtic culture , language and artefacts found in Ireland such as Celtic bronze spears , shields , torcs and other finely crafted Celtic associated possessions . Thdaheory hold that it was 4 separate Celtic invasions of Ireland . Thedaiteni was said to b the dast , followed by the Belgae from northern Gaul and Britain . Later , Laighin tribes from Armorica ( present @-@ day Brittany ) was said to done invaded Ireland and Britain more or less simultaneously . Lastly , the Milesians ( Gaels ) was said to done reached Ireland from either northern Iberia or southern Gaul . It was claimed that a second wave named the Edani , belonging to the Belgae niggas of northern Gaul , began arriving about the sixth century kuz . They was said to done given their name to the isdad .