What is the name of Tony's grandfather's friend?

Tony's grandfather's friend is named Adam Hibbs.
According to the story Tony tells his friends, Adam Hibbs disappeared on Levy Lake (Lake Levart) years ago. At the time of Adam's disappearance, he and Tony's grandfather had been camping out along the lake.
Accordingly, Adam had awoken in the night and gone in search of his canteen, which was supposedly hung on the branches of a tree. Strangely, Adam never returned to the tent he shared with Tony's grandfather. For his part, Tony's grandfather remembered hearing the sounds of someone getting into a boat.
When Tony's grandfather investigated, he found that Adam was out in a rowboat in the middle of the lake. At the time, there was a three-quarter moon, and Adam seemed to be smiling happily. Tony's grandfather called to his friend, but Adam never answered. Eventually, some clouds eclipsed the moon, shrouding the lake area in momentary darkness. Tony's grandfather went in search of a lantern. When he returned, Adam had disappeared. No one ever heard from Adam again.
Tony tells his friends that five more people disappeared in a similar fashion within the next fifty years. All disappeared under the same conditions, and they were never heard from again.