This is the 9146th most frequent Russian word.
северными
"Northern" (instrumental or plural form).
Adjective modifying 'регионами', describing their geographical location.
Активисты собирают воспоминания людей, связанных с северными регионами.
Activists are collecting memories of people connected with northern regions.
Adjective modifying 'художниками', collectively indicating artists from the north.
На выставке представлена коллекция северными художниками.
At the exhibition, there is a collection presented by northern artists.
Adjective modifying 'народами', specifying them as originating from the north.