Even the English mapped it in 1685 !
It has been inhabited from probably before the time of the Pyramids!
In contrast Map of Ireland 1540s
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“Ireland 1450” by Original uploader was (Automated conversion) at en.wikipedia – Originally from en.wikipedia; description page is/was here.. Licensed under Public domain via Wikimedia Commons.
The Irish controlled most of Ireland outside the Pale — in Sligo, the O’Connors held Sway at the time, but this would change to the O’Haras as the most populous after the English crushed Irish Countryside during, and after, the Tudor period.