Why did Kelly Freas pick the name Herman Klotz?

According to Herman Klotz's daughter, Janis, Herman was Kelly Freas' dentist in 1958.
Herman died in 1984. Janis says, "I had no idea it was such a famous back cover.
All I knew it was my father's claim to fame."
Here we see Kelly's front and back covers of issue #43.

Mad #43 Back Cover Mad #43