Dennis Kim

From Memory Alpha, the free Star Trek reference

Dennis Kim was a Human male and the cousin of Harry Kim.

Both Harry and Dennis had a mutual friend, Maxwell Soroyan who was killed by the Maquis a few years prior to 2377. When the USS Voyager reestablished communications with the Alpha Quadrant, Dennis wrote a letter to Harry, where he talked about Soroyan's death. (VOY: "Repression")