Searching for g-g-grandfather d.o.b. 1820s-1840s

I have relatives on my great-grandfather’s side of the family as well. There are, I was told, four possible spelling of the last name: Vang, Von, Wang and Vaughn (also Vingt, Vaugh...). There are three versions of the first name: Carl, Karl, and Carlos. If anyone could give me the correct spellings, that would be wonderful, and also where the name originated from. Our family name, Wong, originated from someone choosing the closest sound to “Vang”. “Carl Vang” was born in the early to mid-1800s. He came to China as a sea merchant or captain and was a pilot sailing between China seaports of Shanghai, Port Arthur (now Lushun) and Hong Kong. He had resided in Harbin and Dalian, China, and visited Hong Kong frequently. He had four children. He returned to Norway with two daughters, both of whom we were told had blonde hair and blue eyes. It was rumoured he later left Norway and returned to work as a ship pilot, and was also an honorary consul or high official with the Norwegian Consulate in China. He was also rumoured to have died and been buried in Dalian, China. All cemeteries, records and the Norwegian consulate in Dalian were destroyed in the Chinese Cultural Revolution. My great-grandfather, the first-born of Carl Vang, was born on February 6, 1870 in Dalian or Harbin, China. He moved to Hong Kong with Carl and mother. He later became the comprador of the Hongkong and Kowloon Wharf and Godown Company in Hong Kong, served in many directorships, committees, and was appointed a Justice of the Peace for the colony. I have a photo of “Carl Vang”, which is attached (please right-click and select "Open Image in New Tab"). [View image]