About Saad Al Jassim
Saad Al Qassim moved from Odat-Sudair (Saudi Arabia) to Al-Zubair (Iraq) at age 12 along with his mother & his 5 sisters. In Al-Zubair, and over time, the name of Saad Al-Qssim was transformed to Saad Al-Jassim to suit the dialect of the new region.
At age 73, Saad Al Jassim and his little family (wife, 2 sons, and 2 daughters) returned back to Riyadh (Saudi Arabia). They still carry Al Jassim name.
On the other hand, his Father (Othman Al Qassim) who was based in Al-Odah, established a new family with his new wife Muneerah (mother of Abdulaziz, Saad's half-brother). This part of the family kept their original name (Al Qassim).
Othman & Muhammed sons of Saad ben Othman Al Jassim and Othman son of Abdulaziz ben Othman Al Qassim are first degree cousins regardless of the slight family name difference. The later is married to his cousin Naaimah, sister of the first two.