The martyred Sayed titled with (Alakbar) because he is older than Imam Zain Alabedeen (Ali bin Alhussain) and this was stated by Alsajad (AS) when Ibn Zeiad asked him "Didn’t Allah kill Ali?" Imam (AS) replied: He was a brother older than me called –Ali- and you killed him. (3)

Alsajad (AS) was titled with (Alasghar; the younger) and the Martyred with (Alakbar) by number of historians e.g.:

1. Ibn Qutaibah in Alma'aref page 93 said: Alhussain begotten Ali Alakbar, his mother is the daughter of Abi-morah, and Ali Alasghar his mother is a mother of a boy (slave). In the page 94 he said: Ali Alasghar bin Alhussain is only son who continued Alhussain progeny.

2. Aldainori in the AlAkhbar Altewal (the long news) page 256 said: no one made it among companions of AlHussain, his sons, and his nephew except Ali Alasghar.

3. AlSuhaili in Rauth AlAnef V2, Page 326 said: Ali Alakbar was killed with him (Alhussain) but Ali Alasghar wasn’t killed; his mother is a slave called Solafah bint Khosrau Yazdegerd III.

4. Aldeiar-bakri said on Thursday's history v2, Page 319: Zain-o-Abedein was 3 years old and he is Ali Alasghar but Ali Alakbar was killed with his father.