The most prominent families in Qatar

Qatar, Top 10 Families (Weighted by market value) 

Thani (rulers)

 Mohannadi
 Attiya
 Suwaidi
 Kamal
 Ibrahim
 Salat
 Mana

 Hitmi
 Fardan

 Note :a family in Qatar might be much bigger than in the west -  some families have thousands or ten thousand members - I guess

source