Conversation so far:
What are the stereotypes involved in this article about Agatha Christie?
Agatha Christie occasionally inserted stereotyped descriptions of characters into her work.
What kind of stereotyped characters did Christie include in her work?
For example, Agatha Christie described Hebraic men with hook-noses wearing rather flamboyant jewellery in the first editions of the collection The Mysterious Mr Quin.
Are there any other interesting aspects about this Wikipedia article on Agatha Christie?
In The Hollow, published as late as 1946, one of the more unsympathetic characters is a Whitechapel Jewess with dyed hair and a voice like a corncrake.

Question: Did she have any influences in her life for her characters?
Self-contained rewrite: Did Agatha Christie have any influences in her life for her characters?