Give a stream of consciousness and then the final answer. Dopp kit is a term particularly in use in America for toiletry bags. The name derives from the early 20th century leather craftsman Charles Doppelt, whose company designed the case in 1919. While the case is named after Doppelt, it appears that the case was actually designed by Doppelt's nephew, Jerome Harris.

Based on this passage, where did the name dopp kit come from?
To answer this question, we should know that: The name derives from the early 20th century leather craftsman Charles Doppelt, whose company designed the case in 1919.
So, the final answer is the early 20th century leather craftsman Charles Doppelt , whose company designed the case in 1919.