Både - begge

The English both is både or begge in Norwegian.
Både requires og:

Både broren min og kona hans jobber i et IT-firma.
Both my brother and his wife work in an IT-company.

It is possible to coordinate more than two elements
in Norwegian:
Både Ken, Anna, Maria og Peter studerer i Trondheim.
(Both) Ken, Anna, Maria and Peter (all) study in Trondheim.

but

Begge foreldrene mine er lærere.
Both my parents are teachers.

Note that begge can stand alone:
Begge er lærere.
Both are teachers.