Who were the Companions who pledged allegiance to the Messenger of Allah, may Allah bless him and grant him peace, in the First Pledge of Allegiance?

Ibn Hisham, in his Sirah (biography of the Prophet), mentioned the names of those who witnessed the First Pledge of Aqabah. They were twelve men from the Ansar: As'ad ibn Zurarah, Awf and Mu'adh sons of Afra, Rafi' ibn Malik, Dhakwan ibn Abd Qays, Ubadah ibn al-Samit, Yazid ibn Tha'labah, Al-Abbas ibn Ubadah, Uqbah ibn Amir, Amir ibn Hudaydah, Abu al-Haytham Malik ibn al-Tayyihan, and Uwaym ibn Sa'idah.