Yahya ibn al-Qasim
Yahya III ibn al-Qasim was the eighth Idrisid ruler and sultan of Morocco. He took over after the death of Ali II in 880. He died in 904.
He was nicknamed al-Kettani, or 'the one related to linen', "Kettan" in Arabic. This nickname was a result of him ordering his troops in Tlemcen to use linen tents. His descendants are the Kettani family, which is well known in Morocco.