What is the demonstrative pronoun in this sentence This Max who from Switzerland?

The demonstrative pronoun in the sentence "This Max who from Switzerland?" is This.

Here's why:

* Demonstrative pronouns point to specific people, places, or things. They include words like this, that, these, and those.

* In this sentence, "This" is used to specifically identify Max.

The sentence itself is grammatically incorrect, but "This" functions as the demonstrative pronoun.