Howard and Buglar are Sethe’s sons. When Schoolteacher comes to recapture Sethe and her children, she tries to kill them along with her baby daughter, but is able only to kill the daughter. By the beginning of the novel, they have run away from 124 and are absent for the entire story.
The timeline below shows where the character Howard and Buglar appears in Beloved. The colored dots and icons indicate which themes are associated with that appearance.
Part 1, Chapter 1
Part 1, Chapter 12