The brothers of Aba Al-Fadl Al-Abbas (peace be upon him)..

The approved history books mentioned that the Moon of the tribe; Aba Al-Fadl Al-Abbas (peace be upon him) has eighteen brothers, from different mothers who were married to the Commander of the Faithful; Imam Ali (peace be upon him), eleven of those brave knights were martyred in the timeless Battle of Karbala in defense of the supreme ideals and principles advocated by the Master of martyrs; Imam Abu Abdillah Al-Hussayn (peace be upon him). Those brave men were:
The sons of Lady Saint Fatima Az-Zahra (peace be upon her):
1- Imam Al-Hassan (peace be upon him)
2- Imam Al-Hussayn (peace be upon him)
3- Al-Mohassen (peace be upon him)
The sons of Lady Om Al-Baneen (peace be upon her):
4- Othman (peace be upon him)
5- Ja'far (peace be upon him)
6- Abdullah (peace be upon him)
7-Yahya and his mother Asma'Bint 'Umays Nakha'iyah
8- Mohammad and his mother Khawla Hanafiyah
9- Mohammad Asghar and his mother Om Walad
10- Bakr and his mother Layla Bint Mas'oud
11- @awn and his mother Om Walad
12- Mohammad Awsat and his mother Om Sa'eed Bint 'Urwa or Om Walad
13- 'Imran and his mother Om Walad
14- 'Ubaydallah and his mother Layla Dramiyah
15- Ibrahim and his mother Om Walad
16- Omar Al-Atraf and his mother Sahba' Bint 'Abbad Thaghlabiyah
17- Omar Akbar and his mother Om Walad
18- 'Ateeq and his mother Om Walad
This is what we found in many historical books talking about the biography of Imam Ali; the Commander of the Faithful (peace be upon him) and about the timless tragedy of Karbala.