That is Mrs. Van Pels real name. Anne Frank used Mrs. Van Daan in her diary.
Mr. van Dann: Hermann van Pels and Mrs. van Daan: Auguste van Pels
In the diary, she calls the Van Pels the Van Daans. If that is, in fact, the nickname you mean. Sorry if it's not. I just read the diary in my reading class and it specifically says that in her diary they are called the Van Daans but it's really the Van Pels family.
Auguste van Pels (Mrs. van Pels).
Hermann
The "fellow hider" Peter was Peter van Pels, son of Mr. and Mrs. van Pels. Anne also writes about a vivid dream she had of a former boyfriend she deeply cared for, who's name was Peter Schiff.
Peter van Pels's birth name is Peter Aron van Pels.
Mr. van Pels accepted it fairly good-naturedly, while Mrs. van Pels was a bit of a prima Donna and complainer about many aspects of it.
Auguste van Pels went by Petronella van Daan, Kerli, Gusti, and Mrs. Beaverbrook.
Peter van Pels/van Daan.
Fritz Pfeffel. And the Van Daans were actually the Van Pels
Fritz Pfeffer Patter van Pels Mr. van Pels Mrs. van Pels Edith Frank Otto Frank Anne Frank Margot Frank
Mr. Van Pels, Mrs. Van Pels, Peter Van Pels, Margot Frank, Edith Frank, Otto Frank and a dentist friend.