| AP CUNEDDA, Tybion | | B. ABT 417 | | D. ABT 440 |
| AP CUNNEDA, Tegeingle | | B. 426 | | |
| AP CUNOBELINUS, Caractacus | | B. ABT 6 | | D. ABT 50 |
| AP CUSTENNIN, Bledric of Dumnonia | | B. ABT 540 | | D. AFT 613 |
| AP CUSTENNIN, Erbin | | B. 427 | | D. 480 |
| AP CYLLIN, Owain | | B. 90 | | D. AFT 150 |
| AP CYNAN GARWYN, Cadell | | B. 580 | | D. 616 |
| AP CYNFYN, Bleddyn King of Gwynedd and Powys | | B. 1025 | | D. 1075 |
| AP CYNFYN, Rhiwallon | | B. ABT 1020 | | D. 1070 |
| AP CYNGAR, Pedr | | B. ABT 500 | | |
| AP CYNGEN, Aeddan of Powys | | B. ABT 805 | | D. ABT 900 |
| AP CYNGEN AP CADELL, Elisedd | | B. 790 | | D. AFT 814 |
| AP CYNRIC, Cutha of Wessex | | B. 551 | | D. 584 |
| AP DEHEUWAINT, Tegfan Tasciovanus | | B. 310 | | D. 357 |
| AP DINGAD, Senyllt Hael | | B. ABT 400 | | D. 512 |
| AP DWFYN, Doli | | B. 170 | | |
| AP DYFNWALLON, Meurig of Seisyllwg | | B. ABT 780 | | D. 841 |
| AP DYLAN TRAWS, Maeldaf | | B. ABT 423 | | |
| AP EDERN, Cunedda Wledig of Gwynedd | | B. 390 | | D. 452 |
| AP EDNYFED, Clydwyn of Wales Dyfed | | B. 360 | | |
| AP EDNYFED, Tudwal | | B. ABT 360 | | |
| AP EDNYWAIN, Seisyll | | B. ABT 938 | | D. 1023 |
| AP EILUDD, Beli | | B. ABT 630 | | D. ABT 695 |
| AP EINION, Owain Ddantgwyn Brenin Rhos | | B. ABT 445 | | D. 520 |
| AP EINUDD, Caradog | | B. 215 | | |
| AP EINUDD, Eudaf Hen of Cernyw | | B. ABT 235 | | D. ABT 300 |
| AP EINUDD, Gereint | | B. 285 | | D. 365 |
| AP EINYDD, Ednowain | | B. 913 | | D. 1004 |
| AP ELIDYR, Gwriad | | B. 738 | | D. 825 |
| AP ELISEDD, Brochfael | | B. ABT 715 | | D. ABT 773 |