Gwilliam or Gwilliams may refer to:
Gwilliam (surname) Brad Gwilliam (born 1966), Australian rules footballer Dianna Gwilliams (born 1957), educator Edward Gwilliam, English footballer George Gwilliam, English Aramaicist John Gwilliam (1923–2016), Welsh rugby union player and schoolteacher Gwilliam v West Hertfordshire Hospital NHS, English tort law case concerning occupiers' liability
See also Gwilym, a related Welsh name