The next companion to be mentioned is Hazrat Ubayy (ra) bin Kaab. Hazrat Ubayy (ra) belonged to the Banu Muawiyah branch of the Khazraj tribe of the Ansar. His father’s name was Kaab bin Qais and his mother’s name was Suhaila bint Aswad. Hazrat Ubayy (ra) bin Kaab had two titles; one was Abu Munzir, as given by the Holy Prophet (sa) and the second was Abu Tufail, given by Hazrat Umar (ra) because of his son, Tufail.
(Ali Ibn al-Athir, Usd al-Ghabah fi Ma‘rifat al-Sahabah, Vol. 1 [Beirut, Lebanon: Maktabat Dar al-Kutub al-Ilmiyyah, 2016] 168-169)