Bandhu Bhava as per Hindu astrology is the house indicating
relations in a person’s horoscope. The house, which stands for brothers and
sisters, is referred to as Sahaja Bhava (born together).
Bandhu Bhava is examined for indications about relatives and
relationships with them. It is the fourth house in a horoscope.
A strong placement of Budha (mercury) indicates respect of
relatives.
If Guru (Jupiter or Brishaspati) resides in the fourth house
then the person will have highly placed relatives.
If the Lord of the fourth house is malefic, then relatives
will suffer, the person will be disliked by relatives and there will hatred in
the family.