* Mr. Summers: The name suggests warmth, joy, and the season of life associated with happiness. However, he is in charge of running the lottery, a tradition that leads to a brutal and violent death.
* Mr. Graves: The name evokes death and funerals, and the official's role in the lottery is to ensure that the selected person is killed.
The contrast between the seemingly pleasant names and the grim reality of the lottery creates a jarring effect, highlighting the dark and unsettling nature of the tradition. This ironic juxtaposition serves to make the story even more disturbing and thought-provoking.