where does the last name tang come from
Táng (surname) Tang (/tɑːŋ/, Chinese: 唐, mandarin Pinyin: Táng; Japanese: 唐/とう/から; Korean: 당/唐; Cantonese : Tong; old Chinese read Dang), is a Chinese surname. The three languages also have the surname with the same character but different pronunciation/romanization.[1] In Korean, it is usually romanized also as Dang. In Japanese, the surname is often romanized as To. In Vietnamese, it is commonly written as Đường (the anglicized variation is Duong, not be confused with Vietnamese surname Dương which is also anglicized as Duong). It is pronounced dhɑng[2] in Middle Chinese, and lhāŋ in Old Chinese.
Cheng (surname) Cheng (/tʃəŋ/) can be a transcription of one of several Chinese surnames. Since the syllable Cheng represents different sounds in Hanyu pinyin and the Wade–Giles systems of Chinese romanization, some ambiguity will exist as to which sound is represented by the letters "Cheng" if the romanisation and tone is not known. Also within each system of romanisation, each syllable can represent one of several different characters, as with any Chinese syllable.