Why were these nicknames given to the characters in Holes?

In "Holes," characters are given nicknames that reflect their personalities, traits, or histories. For example, Stanley Yelnats is often referred to as "Caveman" due to his time spent digging holes and his connection to his family's history. Other nicknames, like "Zero," highlight the characters' struggles or perceived shortcomings, while also serving as a way for them to reclaim their identities throughout the story. Overall, these nicknames add depth to the characters and enhance the themes of self-discovery and friendship.