Llywellyn was born in Radur, Meisgyn, Glamorganshire, Cymru, the son of unknown parents. The date is not known.
He died after 1317 in Llantrisant, Glamorganshire, Cymru.
His wife was Jonet verch Cynfyn. They were married, but the date and place have not been found. Their only known child was Gawdyn ap Llywelyn (1318-1344).
| Event | Date | Details | Source | Multimedia | Notes | ||
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| Birth |
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| Death | AFT 1317 |
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