What were the first known inhabitants of Ireland?

The first known inhabitants of Ireland were a group of hunter-gatherers who arrived on the island around 10,000 years ago. These people, known as the Mesolithic Irish, were nomadic and lived in small groups. They hunted animals such as deer, elk, and wild boar, and gathered plants and fruits for food. The Mesolithic Irish also made tools and weapons from stone, wood, and bone.