What nationality is the last name ng?

The last name "Ng" is most commonly of Chinese origin. It's a common surname in many Chinese communities around the world, including Hong Kong, Singapore, Malaysia, and the United States.

While it's primarily associated with Chinese heritage, it's also possible for people of other nationalities to have the last name Ng. It might be adopted through marriage, or it could be a variation of a different surname that has become Anglicized.