- HWLCYN LLWYD Glynllifon (d. 1403) - see GLYN
- LLOYD, HWLKIN Glynllifon (d. 1403) - see GLYN
- HWMFFRE ap HYWEL (fl. first half of the 17th century), poet
- HWMFFRE HYWEL - see HWMFFRE ap HYWEL
- HYWEL ab EDWIN (d. 1044), king of Deheubarth
- HYWEL ab EINION LLYGLIW (fl. 1330-1370), poet
- HYWEL ab OWAIN GWYNEDD (d. 1170), soldier and poet
- HYWEL AEDDREM - see HYWEL AERDDREN
- HYWEL AEDDREN - see HYWEL AERDDREN
- HYWEL AERDDREN or AEDDREN or AEDDREM (fl. c. 1540-1570?), poet
- HYWEL ap 'Syr' MATHEW (d. 1581), poet, genealogist, and soldier
- HYWEL ap DAFYDD ap IEUAN ap RHYS (fl. c. 1450-1480) Raglan, poet
- HYWEL ap DAFYDD LLWYD ab Y GOF (fl. c. 1500), poet
- HYWEL ap GRUFFYDD (d. c. 1381)
- HYWEL ap GRUFFYDD ap IORWERTH (fl. c. 1300-1340)
- HYWEL ap IEUAF (d. 985), king of Gwynedd
- HYWEL ap IEUAN ab EDNYFED (fl. end of 14th and beginning of 15th century) - see WYNN
- HYWEL ap IORWERTH ab OWAIN Lord of Caerleon - see MORGAN ap HYWEL
- HYWEL ap LLYWELYN ap MAREDUDD (fl. c. 1500?), poet
- HYWEL ap MAREDUDD ap CARADOG ap IESTYN - see MORGAN ap CARADOG ap IESTYN
- HYWEL ap RHEINALLT (fl. c. 1471-1494), poet
- HYWEL ap RHODRI MOLWYNOG (d. 825), king of Gwynedd
- HYWEL BANGOR (fl. 1540), an itinerant bard
- HYWEL CEIRIOG - see HUW CEIRIOG
- HYWEL CERNYW - see WILLIAMS, HUGH
- HYWEL CILAN (fl. c. the end of the 15th century), poet
- HYWEL CYNON - see HOWELLS, THOMAS
- HYWEL DAFI - see HYWEL ap DAFYDD ap IEUAN ap RHYS
- HYWEL DDA (d. 950), king and legislator
- HYWEL ERYRI - see EVANS, HUGH
- HYWEL FOEL ap GRIFFRI ap PWYLL GWYDDEL (fl. c. 1240-1300), poet
- HYWEL GETHIN (fl. c. 1485), poet
- HYWEL GETHIN - see HYWEL GETHIN
- HYWEL HEILIN (fl. 15th c.), poet
- HYWEL HIR (fl. 1600-1640), poet, probably in holy orders
- HYWEL RHEINALLT - see HYWEL ap RHEINALLT
- HYWEL SWRDWAL (fl. 1430-1460), poet
- HYWEL TUDUR - see ROBERTS, HOWELL
- HYWEL Y FWYALL, Syr - see HYWEL ap GRUFFYDD
- HYWEL Y PEDOLAU, Syr - see HYWEL ap GRUFFYDD ap IORWERTH
- HYWEL YSTORM (or YSTORYN) (fl. first half of the 14th century), clerwr or composer of lampoons
- HYWEL YSTORYN - see HYWEL YSTORM