What does Seren mean?
The modern Welsh word for 'star', a popular girls' name in Wales. (A separate Turkish surname Seren is unrelated.)
What does Blodwen mean?
From Welsh 'blodau' (flowers) + 'gwen' (white, blessed, holy), so 'white flowers' (or 'blessed flowers'). Known from Joseph Parry's 1878 Welsh opera 'Blodwen'.