Hades ( Aides , Aidoneus , or Haidês ) , the eldest son of the Titans Cronus and Rhea ; brother of Zeus and Poseidon , is the Greek god of the underworld .
Head entity: rhea Q108419 18
Tail entity: hades Q41410 0
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P25