How does Teddy's nickname emphasize the differences between the Farquars and their servants?

Teddy's nickname highlights the social divide between the Farquars and their servants by showcasing the familiarity and affection the Farquars reserve for their own, while simultaneously underscoring the servants' subordinate status. The use of a casual, endearing nickname suggests an intimacy within the upper class that is not reciprocated towards the servants, who remain distanced and formal. This contrast reflects the broader themes of class disparity and the lack of genuine connection across social boundaries.