Why do many countries in Asia end with -stan? e.g. Afganistan, Uzbekistan

Well, look at it another way. Why do so many European countries end in -land? England, Finland, Scotland, Iceland, Ireland, the Netherlands, Poland, etc. -Stan means 'place of' as a suffix so it's just one of those things.

Because "Sthan" means Place in eastern languages. And Afganisthan=Land of Afghans

Because at one time they where all one countrybut then broke up

Google.it

Why do the continents start with the same letter and end with the same letter? (Not including north south,east or west) That is the question,
But in all honesty I have no clue

Kazakstan. my mom was born there ^.^

Um, it's a general coincidence. Duh.

Because they want to.

Because Asia's like that.