your neighbors; his neighbors; their neighbors (depending on context)
Você conversa com seus vizinhos?
Do you talk to your neighbors?
Do you know your neighbors?
Enquanto eles estavam fora no feriado, seus vizinhos tomaram conta do cachorro.
While they were away on vacation, their neighbors took care of the dog.
Eles estão de bem com seus vizinhos.
They get along well with their neighbors.
E a Sra. Cheung deseja felicidades aos seus vizinhos.
And Mrs. Cheung wishes her neighbors well.
— Amor à Flor da Pele (2000)
Você tem inveja dos seus vizinhos?
Are you envious of your neighbors?
Who are your neighbors?
E por favor, não incomodem seus vizinhos.
And please, don't disturb your neighbors.
— Swades: We, the People (2004)
We are your neighbors.