Sa'd ibn Ubadah
Husayn of Zaragoza (in the Arabic sources "Al Hossain ibn Yahia al Ansari ibn Saad al Obadi" and "Ḥusayn ibn Yaḥyà al-Anṣārī" o "Al-Ḥusayn ibn Yaḥyà al-Anṣārī") was a descendant of Sa'd ibn Ubadah the companion of Muhammad, and the Wali" (governor) of Zaragoza from 774 to 781.