Siwan

Siwan may refer to

• Sivan, a month of the Hebrew calendar
• Siwan (Mandaean month), a month of the Mandaean calendar
• The Welsh form of Joan (first name)
  • Siwan or Joan, Lady of Wales, the wife and consort of Llywelyn the Great, Prince of Wales
• Siwan (play), by Saunders Lewis
• Sewant, beads used as a currency by Native Americans
• Siwan (album), a musical orchestra project by Jon Balke, and featuring Amina Alaoui
• Siwan, Henan, a town in Xichuan County, Henan, China

India

• Siwan district, in the state of Bihar
• Siwan, Bihar, the headquarters of the Siwan district
• Siwan subdivision, of Siwan district
• Siwan (community development block), in Siwan district
• Siwan Lok Sabha constituency, a parliamentary constituency in Bihar
• Siwan Assembly constituency, a constituency of the Bihar Legislative Assembly
• Siwan Junction railway station, a railway junction station in the state of Bihar
• Siwan, Raebareli, a village in Uttar Pradesh

People

• Siwan (Korean singer), member of boy group ZE:A
• Siwan Morris, Welsh actress
• Siwan Lillicrap, Welsh rugby union player