Romanization
張, 张, and 章 are also commonly romanized as Chang on Taiwan and among the Chinese diaspora using the older Wade-Giles system. All three are also romanized as Cheung in Cantonese; Teo and Teoh in Teochew; Chong in Hakka; Tsan and Tsaon among Wu languages like Shanghainese; Tong in Gan; and Tiong, Tjong in the Philippines; and Sutiono or Thiono in Indonesia.
張 was the Chữ Nôm form of the Vietnamese surname Trương and the Hanja of the Korean surname romanized Jang and Chang (장). It remains the Kanji for the Japanese surname romanized Chō.
In Vietnamese, the surname written 章 in Chữ Nôm is clearly distinguished and written as Trang or Chương.
Read more about this topic: Zhang (surname)