- GERAINT OF PENTRAETH
Bartrum suggests three versions of his pedigree:
(1) Geraint ap Tegwared ap Cynfawr ap Madog ap Nynnio ap Idnerth ap Cadwr ap Cadog
ap Dissaeth ap Cathus ap Rhufan ap Ededwy
(2) Geraint ap Tegwared ap Cynfawr ap Madog ap Nynnio ap Idnerth ap Edryd
(3) Geraint ap Cynfarch ap Nynnio ap Idnerth ap Edryd
In his notes to the pedigrees, Bartrum says Geraint was born c. 1200, and that the versions attaching
him to Idnerth ap Edryd (who descended from Marchudd ap Cynan) are incorrect.
We agree this  is the correct ancestry of Geraint, but estimate his birth as c. 1170.
Neither Bartrum, nor any other source, point to or even suggest the ancestry of the man at the top of the pedigree.
We suggest the man appearing at the top of the pedigree was a younger son of Cadrod (and brother of Cilmin Droed Ddu) ap Gwriad,
which Cadrod was a brother of Merfyn Frych. In 816, Merfyn had evicted Hywel ap Caradog of Rhos from Anglesey.
As the eldest son of former Gwynedd king Cynan Tindaethwy's only daughter and heiress, Merfyn then laid claim to the kingship.
As the youngest son, Cadrod inherited his mother's manor in Tindaethwy, When Cadrod died, that manor was inherited by
his youngest son. That manor, we think, was located in the parish of Pentraeth in the commote of Tindaethwy in
Idnerth ap Edryd was born c. 1040 but was descended from Marchudd ap Cynan, whose lands
were in Rhos, not Anglesey. This false assignment  may have seemed somewhat logical datewise as Idnerth
ap Edryd was born only 25 years later than Idnerth ap Cadwr.
This pedigree  actually was speaking of a c. 1110 Geraint ap Cynfarch who was a first-cousin
of Cynfawr ap Madog in Pedigree #1. The attachment to Edryd was based on the earlier citation which was the source for
Peniarth 127, 68
Peniarth 129, 103
I - DAFYDD of PENTRAETH
A man from the tribe of Marchudd ap Cynan probably did marry an heiress of the Pentraeth family about
the year 1130. HLG 7a mentions a Dafydd ap Tegwared ap Hoedliw ap Hyfaidd ap Morien ap Moriddig ap Owain ap Marchudd
ap Cynan. This Dafydd is called a "man of Pentraeth" by Bartrum in his "Early Wesh Genealogical Tracts", page 156.
II - MEN of TREFGOED, LLEYN
Bartrum's chart "Geraint 2" in his Welsh Genealogies AD 300-1400" includes an unattached family
also found in Pentraeth, in which a Hywel ap Gruffudd ap Gronwy Trefgoed had married the heiress, Gwenhwyfar ferch Gronwy
ap Llewelyn ap Einion ap Geraint. We suggest this Geraint was the son of Einion ap Geraint ap Tegwared.
to Bartrum's chart, Hywel and Gwenhwyfar had a son, Gruffudd, who had a son Iorwerth. This family is found in Peniarth
177, 166 and this source presents the following data (dates are our estimates):
1275 Gronwy Trefgoed
Hywel==========Gwenhwyfar ferch Gronwy
heiress of Rhiwlas, in Pentraeth
ferch Ithel ap Hywel,
ferch Hywel ap Cwnws,
from Hwfa ap Cynddelw
residing at Rhiwlas, Pentraeth
Bartrum then charts another wife for Iorwerth ap Gruffudd as Gwenhwyfar ferch Hywel ap Tegwared
ap Madog Goch, giving Dwnn ii, 265 as his source. But that citation reads "Sir David ap Rhys ap Ieuan ap Iorwerth ap
Gruffudd ap Iorwerth Trefgoed" and adds "the mother of Ieuan ap Iorwerth was Gwenhwyfar ferch Hywel ap Tegwared ap Madog Goch".
A chart of that family would show:
1350 Iorwerth======Gwenhwyfar ferch Hywel ap Tegwared
1445 Sir David
residing at Trefgoed, Lleyn
In Bartrum's indexes to his charts, he presents the spouse of Gwenhwyfar as "Iorwerth ap
Gruffudd ap Hywel" and gives his source as Dwnn ii, 265. We assume Bartrum was fixated on the other pedigree of a man
from Trefgoed and somehow misread "Iorwerth Trefgoed" as "Hywel"
We believe the Iorwerth Trefgoed in this pedigree was a brother of Gronwy Trefgoed in the
first chart in this appendix. The editor of the 1846 book of Dwnn pedigrees, Sir Samuel Meyrick, provided a location
heading for the page 265 pedigree as "Tindaethwy Trefgoed" but there was no such place name in all Anglesey. There was
a Trefgoed in far north Lleyn, in the commote of Dinllaen, less than 20 miles south of Tindaethwy. It is our belief
that the brothers Gronwy and Iorwerth of Trefgoed were sons of Tudor (1245) ap Carwed (1210) ap Gwyn (1175) ap Ednowain (1140)
ap Eginir (1110) ap Gwyn (1075) ap Eginir (1045) ap Collwyn (1010) ap Tangno. Collwyn had been Lord of Lleyn and this
branch of his family was found in Eifionydd and northern Lleyn.