GWGAN ap LLEWELYN ap MORIDDIG of BRYCHEINIOG
By Darrell Wolcott
In his family charts AD300-1400 , Peter Bartrum charted a total of 50 men descended from a single Gwgan ap Llewelyn.
After we completed our analysis of these families, which included two separate men named Gwgan ap Lewelyn, we found the families
included 70 men. These men DID all appear on the Bartrum charts, but were conflated, with a single name representing two men
who lived about 60 years apart. In a few cases, a single Bartrum name actually represented 3 different men of the same
Perhaps the most obvious of these is Hywel Gethin, charted as a grandson of Gwgan. Bartrum charts his "father" as both
Philip ap Gwgan and Hywel ap Gwgan, apparently in the belief that some sources call his father Philip  while other call
him Hywel.  In fact, these were two entirely separate families who lived a full 60 years apart.
(a) ap Ifor (1165)
ap Bledri (1130) ap Rhys (1095) ap Bledri (1065) ap Cadifor Fawr (1030)
(b) ap Hywel
(1165) ap Trahaearn (1135) ap Gwgan (1105) ap Gwgan Blaidd Gwyrdd (1075) ap Bleddyn (1045) ap Maenyrch (1015)
CONTINUATION OF LINES OF SAME-NAMED
As shown in our chart of "Two Drymbenogs",  there were two cousin branches of this family which had copied a string of
male names, each born two generations apart, which produced separate strings of men named Llewelyn ap Moriddig ap Drymbenog
ap Maenyrch ap Dryffin. That string was continued by 4 different sons of Llewelyn,  the longest of which is seen
in the families descended from Gwgan ap Llewelyn, through a son named Hywel.
Hywel (a) 1175 Llewelyn
Tal (b) 1205 Gwgan
1240 Trahaearn Fychan
(c) 1235 Hywel (d)
Madog (e) 1265 Trahaearn Tal (f)
Trahaearn (g) 1295 Trahaearn Fychan (h)
1340 Joan (j)
1330 Madog (k)
1360 Trahaearn (m)
1395 John (n)
(a) This Hywel married a daughter (1185) of Reginald Aubrey (1155) son of
William Aubrey (1125) son of Reginald Aubrey (1095) son of Sir Reginald Aubrey (1060), one of the knights serving with Sir
Bernard Newmarch in the conquest of Brycheiniog.  This Hywel also married Cecily (1180), daughter of William Burghill
(1150) son of Richard Burghill (1120) son of John Burghill (1090) son of Sir Humphrey Burghill (1060), the latter being another
of Newmarch's knights.  Hywel also had a brother named Gwgan Fychan.
(b) This Trahaearn Tal had a brother named Hywel Gethin. His
wife is unknown
(c) This Trahaearn Fychan married Ann (1255) daughter of Philip Walbyf
(1230) son of Philip Walbyf (1200) son of William Walbyf (1170) son of Sir Philip Walbyf (1140) of Llanhamlach, Brycheiniog.
 This Trahaearn Fychan had a brother named Madog Tal.
(d) This Hywel married Marged (1240) ferch Hywel (1200) ap Gruffudd
(1165) ap Gwallter (1135) ap Trahaearn Fawr (1095),  Hywel had a brother, Philip.
(e) This Madog had a brother, Jenkin. No wife is cited for either man.
(f) This Trahaearn may not have had the nickname "Tal" as most writers
conflated him with the man in item (b) above. He had a brother called Hywel Ddu.
(g) This Trahaearn had
a brother named Maredudd Dew.
(h) This Trahaearn Fychan had a brother named Thomas.
(j) Joan married Gwilym (1335) ap Dafydd (1305) ap Gwilym Fychan (1275)
ap Gwilym (1245) ap Owain Fychan (1210) ap Owain (1180) ap Cynharwy (1150) ap Llewelym (1115) ap Moriddig Warwyn (1080). 
(k) This Madog had brothers Thomas and Dafydd.
(m) This Trahaearn married (1) Lysod (1365) ferch Dafydd (1335) ap
Hywel Fychan (1295) ap Hywel (1260) ap Einion Sais (1225).  He married (2) a daughter (1360) ferch Lleuci (1330) ferch
Hywel Fychan (1295) ap Hywel (1260) ap Einion Sais (1225).  These ladies were 1st-cousins. Jenkin Pitcher was the
father of this unnamed daughter and the husband of Lleuci.
(n) This John had a brother, Madog.
GWGAN FYCHAN ap GWGAN ap LLEWELYN
Both men named Gwgan
ap Llewelyn also had a son named Gwgan Fychan. They also continued the copy-cat naming through sons named Hywel. The
earliest of those men even continued the sequence through two different sons, which produced 3 men named Gwilym ap Hywel Grach:
1145 Gwgan ap Llewelyn
1175 Gwgan Fychan
1205 Hywel 1205
Gwgan ap Llewelyn
1235 Hywel Grach
1240 Gwilym 1235 Gwgan Fychan
1265 Gwilym (a) 1275
Hywel Grach 1270 Hywel
1305 Gwilym (b) 1305 Hywel
1375 Gwenllian (c)
(a) This Gwilym ap Hywel Grach ap Hywel married Marged (1275) ap Gruffudd
(1235) ap Madog (1195) ap Hywel Felyn (1165) ap Gruffudd (1135) ap Ifor Bach (1105). 
The long string of
same-named cousin lines ended with Gwilym. He named sons Trahaearn, Rhys and Ieuan while his c. 1335 counterpart had
a single son named Hywel. However, two of his son's names were copied by the c. 1305 Gwilym.
(b) This Gwilym ap Hywel Grach ap Gwilym married Elisabeth (1320) daughter
of Philpot Walbyf (1290) son of Philip III (1260) son of Philip II (1230) son of Philip Walbyf (1200) son of William (1170)
son of Sir Philip Walbyf (1140) son of Sir William (1115) son of John (1085) son of Sir John Walbyf (1060), the latter being
a knight in the service of Sir Bernard Newmarch. 
While this branch of the family did not share in the "same-named" tradition beyond Hywel ap Gwgan Fychan (the 2-generation
later cousin branch did not include a "Gwilym ap Hywel ap Gwgan Fychan", it did create some shorter same-named lines with
sons named Trahaearn and Ieuan.
Isabel (1) 1340 Ieuan Gwyn 1335 Trahaearn (2) 1335 Ieuan
1375 Thomas (3) 1370 Ieuan Gwyn (4)
1400 Rhys (5)
1415 Llewelyn (6)
She married Hywel Hir (1325) ap Ieuan (1295) ap Hywel Fwya (1265) ap Trahaearn (1230) ap Ieuan (1200) ap Meurig (1170) ap
Cynider (1140) ap Ithel (1110) ap Caradog (1080) ap Bleddyn (1045) ap Maenyrch (1015). 
He married Lleuci (1335) ferch Morgan (1295) ap Richard (1265) ap Gruffudd (1235) ap Llewelyn (1205) ap Maredudd Bengoch (1175)
ap Llewelyn Fraisg (1145) ap Hywel (1115) ap Seisyll (1085) ap Llewelyn (1055) ap Cadwgan (1020) ap Elystan Glodrydd (990).
He married Gwenllian (1390) ferch Morgan (1360) ap Maredudd Llwyd (1330) ap Maredudd (1295) ap Rhys Ynfyd (1265) ap Caradog
(1230) ap Rhys (1195) ap Trahaearn Fychan (1165) ap Trahaearn (1135) ap Gwgan (1105) ap Gwgan Blaidd Gwyrdd (1075) ap Bleddyn
(1045) ap Maenyrch (1015). 
He married a daughter (1380) ferch Thomas Llwyd (1340) ap Thomas (1305) ap Trahaearn Tal (1265) ap Hywel (1235) ap Gwgan (1205)
ap Llewelyn (1175) ap Moriddig (1145) ap Drymbenog (1110). 
He married Alis (1415) ferch Dafydd (1385) ap Llewelyn (1350) ap Hywel (1320) ap Ieuan (1290) ap Llewelyn (1260) ap Dafydd
(1225), the latter being a brother of Einion Sais of Brycheiniog. 
He married Elen (1435) ferch Rhys Ddu (1405) ap Hywel (1375) ap Morgan (1345) ap Rhys Llwyd (1315) ap Gruffudd (1280)
ap Rhys (1250) ap Philip Fychan (1220) ap Gwilym (1185) ap Maredudd (1155) ap Rhydderch (1125) ap Bledri Latimer (1095) ap
Bledri (1065) ap Cadifor Fawr (1030). 
(c) This Gwenllian ferch Gwilym ap Hywel Grach ap Hywel married Sir
Dafydd Gam (1365) of Agincourt fame , descended from King Bleddyn ap Maenyrch. She had a brother named Hywel born
c. 1365, whose son was Richard. This family thus ended their pattern of copying son's names from an earlier cousin branch.
 Charts "Drymbenog" 3-6
 Dwnn ii, 43; Harl. 3535, 104; Bodleian
Add A281, 306
 Dwnn ii, 38; LB 147; Harl 2300(2),
 Marriage of Llewelyn ap Hywel ap Ieuan
to a daughter of Richard ap Jenkin ap Richard is cited in Dwnn ii, 38 and LB 147
 Marriage of Roger ap Jenkin ap Richard
to Gwerfyl ferch Hywel ap Morgan ap Rhys is cited in Dwnn ii, 43
 See our paper "Family of Drymbenog
ap Maenyrch" Chart 2, and its comments, at the link below:
 The sons were Gwrgeneu, Seisyll, Cynharwy
and Gwgan, the first 3 of which were discussed in the paper linked immediately above
 Golden Grove Ms, 1509
 Harl 2289, 182
 Protheroe IV, 221
 Harl 5835, 46
 Harl 2289, 190
 Harl 2289, 122
 Pen 128, 787a
 Glam 145 = Golden Grove Ms 583
 Dwnn ii, 38 & 55
 Pen 133, 171
 Pen 131, 231
 Pen 131, 231
 Harl 2289, 188
 LB 147
 Dwnn ii, 38
 Pen 133, 186