Aneirin is very nice. And I
LOVE Emlyn!
Braith and
Celyn are nice too.
I think any of those names would be usable, except for maybe
Sior /
Siorus. It would have more pronunciation/spelling problems than the rest.
Possible sibsets:
Aneirin and
CelynAled and
BraithEmlyn,
Braith, and
CadellEmrys and
Aneirin (
Emrys and
Aled is nice too)
Iago and
MaxenAled and
Sior
Taliesin I see as more mythological so it doesn't really fit with any of these.