Calvin Ng is one of the pre-made NPC chefs in Downtown from The Sims 2: Nightlife. The other two pre-made chefs are Serdar Lewis and Joanne Harris. Calvin usually can't be made playable without cheats, unless he is used as a walk-by on a community lot.
Calvin has the same facial structure as Abhijeet Deppiesse. His name is randomized when Downtown is generated. The name "Calvin Ng" is only referenced in the game files. According to Calvin's SimDNA in SimPE, his hair was black before it turned grey.