Siôn (Welsh pronunciation: [ʃoːn]) or Sion is a Welsh form of the Anglo-Norman Jean,^[1] pronounced in English similarly to the Irish name Seán.

Notable people with the Welsh name include:

People with the surname edit

• Eleri Siôn (born 1971), Welsh radio and television presenter
• Llywelyn Siôn (1540–c. 1615), Welsh-language poet
• Sawnder Sion (16th century), Welsh poet

People with the given name edit

• Siôn ap Hywel (fl. c. 1490–1532), Welsh-language poet
• Sion Bebb (born 1968), Welsh golfer
• Sion Blythe (1781–1835), American pastor
• Sion Record Bostick (1819–1902), American soldier
• Siôn Bradford (1706–1785), Welsh-language poet
• Sion Brinn (born 1973), Jamaican swimmer and coach
• Siôn Cent (c. 1400–1435/40), Welsh-language poet
• Siôn Ceri (fl. early 16th century), Welsh-language poet
• Sion Jones (cyclist) (born 1979), Welsh cyclist
• Sion Russell Jones (born 1986), Welsh singer and songwriter
• Sion Morris (born 1977), Welsh cricketer
• Siôn Phylip (1543–1620), Welsh-language poet
• Sion Hart Rogers (1825–1874), American politician from North Carolina
• Siôn Simon (born 1968), British politician from Birmingham Erdington
• Sion Spence (born 2000), Welsh footballer
• Siôn Treredyn or John Edwards (c. 1605–1656), Welsh priest and translator
• Siôn Tudur or John Tudur (c. 1522–1602), Welsh-language poet

Fictional and mythical characters edit

• Siôn Corn, Welsh name of Father Christmas
• Twm Siôn Cati or Welsh Wizard, Welsh figure in folklore

People with the name "Sion" other than the Welsh name include:

People with the given name edit

• Sion Sono (born 1961), Japanese filmmaker and poet

People with the surname edit

• Constantin Sion, Moldavian chronicler
• Gheorghe Sion, Moldavian and Romanian poet and playwright
• Ioan Sion, Romanian general
• Maurice Sion (1927–2018), American-Canadian mathematician, known for Sion's minimax theorem
• Ion Theodorescu-Sion, Romanian painter

Fictional characters edit

• Sion Eltnam Atlasia, a character in the dōjin soft fighter series Melty Blood
• Darth Sion, a character in the video game Star Wars: Knights of the Old Republic II: The Sith Lords
• Sion, the Undead Juggernaut, a playable champion character in the video game League of Legends
• Sion Todo, a character in the Japanese anime and arcade game PriPara

• Sean (name)
• John (name)
• Shion, a name
• Shôn, given name