Mostyn Gen 16 - 20 (ext. link)

Ieuan ap Adda (Jevan ap Addaf) (b. abt 1380 Pengwern, Llangollen, Denbighshire, Wales - d. 1448)

Angharad verch Ednyfed
children: Ieuan, Iorworth, Llywelyn, Rhys, Dafydd, Madog, Isabel

Ieuan Vychan ap Ieuan (Jevan Vychan) (d. 1477) Lord of Halkyn and Mostyn
Angharad verch Hywel (b. 1410 - d. aft 1457) Heiress of Halkyn and Mostyn
children: Hywel, Ithel, Rhys, Elis, Margaret, Alice

Hywel "the Dun Stag" ap Ieuan Fychan (Howell ap Jevan Vychan) (b. 1435 - d. aft 1464) Lord of Halkyn and Mostyn
Margaret verch Gruffydd (b. abt 1440 - d. 1532)
children: Richard, Rhys, Ieuan

• Henry Salusbury (d. abt 1501)
  

Richard ap Hywel (b. abt 1477 Mostyn, Flint, Wales - d. February 7, 1540 Mostyn, Flint, Wales) Lord of Mostyn
Katherine (Catrin) Salusbury (b. Lleweni, Henllan, Denbighshire, Wales)
children: Thomas, Hugh, Piers, Elin, Janet, Margaret, Sioned, Dows

Sir Thomas Mostyn (b. 1490 Mostyn, Flint, Wales - d. 1558 Mostyn Hall, Flint, Wales) High Sheriff of Anglesey 1554, Lord of Mostyn
Jane Griffith (b. 1503 Penrhyn Castle, Llandegai, Bangor, Gwynedd, Wales - d. 1572)
children: William, Hugh, Piers, Grace, Katherine, Robert, Fulk, Dorothy, John, Elizabeth, Edward, Roger, Margaret, Anne, Rowland, Richard, Jane