This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
List of unnamed Kwejian.
The father and grandfather of Booker worked for the Emerald Chain. As they worked with the Chain, and decimated the trance worm population, the relationship between them and Booker became strained, leading to an estrangement. As they lay dying on their deathbeds, they requested for Booker to be there with them, for which the answer they got from their son and grandson was his nonappearance. (DIS: "The Sanctuary")