What does Titus mean in feed

Tinnitus (pronounced ti-ni-tis), or ringing in the ears, is the sensation of hearing ringing, buzzing, hissing, chirping, whistling, or other sounds. The noise can be intermittent or continuous, and can vary in loudness ... In rare cases, the sound beats in sync with your heart (pulsatile tinnitus)

Titus is referred to as a handful of times throughout the book, it is a protagonist and the narrator of feed