Young Ibans. Ibans are a branch of the Dayak peoples of Borneo. In Malaysia, most Ibans are located in Sarawak, a small portion in Sabah and some in west Malaysia. They were formerly known during the colonial period by the British as Sea Dayaks. Ibans were renowned for practising headhunting and tribalerritorial expansion and had a fearsome reputation as a strong and successful warring tribe in ancient times.