Landon (lords of Llanddewi, Monmouthshire)

Landres (or Landry of Llanddowror, Carmanthenshire)

Langford (of Allington, Gresford, Denbighshire)

Langley

Langston (of Langiston, Monmouthshire)

Langton (Sir William-of Henllys, Gower)

Lathom (of Lleweni Green, Denbighshire)

Laugharne (of St. Brides, Pembrokeshire)

Laurens (AP WILLIAM AP DAFYDD)

Leighton (of Leighton, Shropshire)

Lewis (of Abergavenny, Monmouthshire)

Lewis (of Y Fan or Van, Caerphilly, Glamorgan)

Lewys (AP RHYS AP HYWEL AP GRUFFUDD)

Lewys (of Bodedern, Llifon, Anglesey)

Lingen (of Lingen, Herefordshire)

Llandaff (Diocese of, Cardiff)

Llandochau (or Wallis, Walsh, Welsh, lords of Llandough)

Llanegwystl (VALLEY CRUCIS ABBEY)

Lloyd (of Abergavenny, Monmouthshire)

Lloyd (of Bodiris, Denbighshire)

Lloyd (of Breconshire)

Lloyd (of Foxhal, Henllan, Denbighshire)

Lloyd (of Llansteffan, Carmarthenshire)

Llwn Hen (ancestor of Gwynfardd)

Llywarch (AP BRAN-of Menai, Anglesey)

Llywelyn (AB ALETH, King of Dyfed)

Llywelyn (AB EINION AP CELYNIN)

Llywelyn (AP MAREDUDD)

Llywelyn (DYFARCH)

Llywelyn (EURDORCHOG, born c.1030)

Long (of Pembrokeshire)

Longford (of Pembrokeshire)

Lord (or Lort, of St Patrick, Pembrokeshire)

Lowther (Quartering of Powell of Hosely)

Lucas (of Hill, Gower)