<>-abad?

In an area from Afghanistan to India and some nearby Central
Asian areas, I see a lot of town names of the form Askhabad,
Faizabad, Azizabad, Jalalabad, Islamabad, Allahabad -- which
have a common element that I interpret as "abad"

Does it mean "city/town/village" in some language? Lots of city/
town/village names mean something like "<something>-city/
town/village", which is a very straightforward sort of name for
such a place.

Related to that subject, I'm sure that "Newton" is short for
"Newtown"; it's an amusing curiosity that Naples (< Ital. Napoli)
and Nablus (West Bank) have names that may derive from
Greek Neapolis ("New Town"). Which is also the meaning of
Russian "Novgorod" and Italian "Villanova", IIRC.