What is XXX's brothers name?
Al-Mayassa bint Hamad bin Khalifa Al-Thani
Sheikha Al-Mayassa bint Hamad bin Khalifa Al-Thani (born 1983) is the sister of Qatar's ruling Emir Tamim bin Hamad Al Thani, and daughter of the country's Father Emir Hamad bin Khalifa Al Thani and former First Lady Moza bint Nasser.