Abū Zakarīyā' Yaḥyā ben Ziyān al-Waṭṭāsī was a vizier of the Marinid sultan of Fez, regent and effective strongman ruler of Morocco from 1420 until 1448. He is the founder of the Wattasid dynasty of viziers and later sultans, and as such often designated as Yahya I in Wattasid lists. He was also known by his nickname Lazeraque, as found in Portuguese chronicles.