Larbaâ Nath Irathen (Kabyle: Larebɛa n at Yiraten, or in Tifinagh, Arabic: الأربعاء ناث اراتين) is a town in the middle of Kabylie, Algeria formerly known as Fort National. It had population of 28,000 in 2001.
Etymology
Larbaa means "Wednesday" in Arabic, the town's traditional souk day, or "four"/"fourth" in Kabyle
N means "of"
Ath Iraten means "sons of Irathen", the name of a major local tribe, recorded by Ibn Khaldun; Irathen may originally have meant "lions".