Siptah was the son of Seti II. and his Syrian concubine Sutailja. He came to the throne at the age of 14 and died at the age of 20, what the analysis of his mummy showed - he ruled for 6 years. So the regent Twosret ruled by his name, who was probably his step-mother. Another interesting person of this time was the chancellor Bay, who probably requisitioned his right for ruling. The tomb of the chancellor Bay KV 13 is situated in the Valley of the Kings.
Siptah was buried in the tomb KV 47 in the Valley of the Kings. His mummy was found in the hideaway of Amenhotep II tomb in the end – KV 35.