Hywel ap Rhys

Hywel ap Rhys ('Howell son of Reese') is a Welsh name that may refer to:

• Hywel ap Rhys (Glywysing), king of part or all of Glywysing (r. c. 840–886)
• Hywel Sais ('Hywel the Saxon'; died 1231), the son of Rhys ap Gruffydd
• Hywel ap Rhys Gryg (fl. 1220s), Hywel Sais's nephew