Surname 夏宇 (Xiayu 
, 夏宇 ) , all around the world, is a rare family name. The family name 夏宇 is habitual in Malaysia, where it is a rare surname, China, where it is a very rare surname, and Chile, where it is an extremely rare surname. In absolute terms, the name is most common in China, Malaysia, and Mexico. More prevalently, 夏宇 is the forename as well as the last name.