See Sulu for other articles with titles that contain, either by relationship or by coincidence, this character's surname.
This character is a member of the Sulu family.

Kikani Sulu was a male Human on Earth in the late 22nd and early 23rd centuries. He worked as an Earth-based shuttle pilot for much of his life, and enjoyed collecting stories and legends from different cultures around the planet. In later years, Sulu would often relate these stories to his grandson, Hikaru. (TOS - Section 31 novel: Cloak)

Kikani was presumably Hikaru's paternal grandfather. See also rarely publicized relatives.