Other names for 4th house:
Ambu,
Hibuka, Paataala, Sukha, Surid * Suhrida, Griha, Matripadma or Matru sthan, rasatala, Bandhu Bhava
Sukhasthan, Bhumi, Vahana
Bandhu: bandhu is derived from anther hindi word which means bandhna -To bind, tie, fix, fasten, chain, fetter; to bind round, put on, To bind together, Bandhu bhava binds via cultural roots, usually more strongly through the mother's birth culture;
through patriotism
and the homeland;
through
childhood schooling and indoctrination
in to the cultural manners of one's people
Bandhu
binds to the land through entitlements of ownership
Bandhu
binds to society through licensing qualifying examinations, diplomas, licenses, proof of schooling.