Cognomen Тхиха (Thiha 
, Txixa , Тхиха 
) , throughout the world, is a widespread last name. The last name Тхиха is characteristic of Myanmar, where it is a common surname, Mongolia, where it is quite a common surname, and Singapore, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Myanmar, Mongolia, and Malaysia. Likewise, Тхиха is the forename as well as the last name.