 One of the participants of the First Council of Nicaea in 325 is identified as a "taēnos".They largely lived among the north Arabian mountain ranges of Aja and Salma with Khaybar north of Medina as their most important oasis, and from there they would make incursions into Syria and Iraq during times of drought.Their concentration in Jabal Aja and Jabal Salma lent the mountain ranges their ancient, collective name "Jabal Tayy".