Gloyw Gwallt Hir ap Rhuddfedd - Lineage

I've been trying to trace these lines and am about to pull my hair out! lol

In the About section of

Vortigern, King of the Britons

It states:

So the family tree starts as follows :-
1 Beli Mawr (The Great), King of Britain c110 BC
+ Don ferch Matonwy.
2 Lludd Llaw Ereint (Silver Handed), King of Britain, c80 BC

3 Afallach ap Lludd, King, c45 BC

4 Euddolen ap Afallach, King, c12 BC
5 Eudos ap Euddolen, c35 AD
6 Eifydd ap Eudos, c80

7 Eudeyrn ap Eifydd, c125
8 Eeuddigan ap Eudeyrn, c170.
9 Rhodri ap Euddigan, c210
10 Gloyw Gwallthir (Long Hair), c250
11 Gwidolin ap Gloyw, c290
12 Gwidol ap Gwidolin, c330
13 Vortigern (Gwrtheyrn Gwrtheneu) (The Thin), High King of Britain, c 370 – 459

+ Severa ferch Macsen, c370

so I've been tracing up the line and it was all trekking along just fine until I got to this #10 Gloyw Gwallthir (Long Hair), c250 and where it has his father as #9 9 Rhodri ap Euddigan, c210, the connection here on Geni has his father as Rhuddfedd Frych ap Caderyn - which doesn't trek from here back with the lineage posted above from the other profile notes.

So who is this Glowy's actual father and which lineage for that has been proven?

It's all VERY confusing, because there are so many conflicting lineages on those links listed in all these profiles.

Any help with clarification would be appreciated. Thanks!