In the days of old, when Genghis Kahn's men were running over Asia, they set their sights on further shores. Rather than "Huns", these warriors were known as Kahn's men, or simply, Kahns. When they had conquered all the way to the water's edge, they built boats, gathered their loot, and bravely went to sea. By a sad twist of fate, they encountered an island of lepers, which resulted in most of the crew being infected.
Hastily leaving that island, they set sail again, but by the time they reached Ireland, there wasn't much left of them. Disembarking on stubby limbs, they set forth, but were soon set upon by the natives for the riches they carried.
Rotted away, but still clever, they hid on the island and awaited rescue and the locals never did get their hands on the treasure.
And that's how the story of the little people got started in Ireland -the leper Kahn's and their pots of gold.