Rosie> Would it be Ceiriog, from John Ceiriog Hughes (1832-1887)? The surname led me to it. Also a small forest near Wrexham. If this isn't right then I'm afraid I for one will need another clue as I'm otherwise stumped. Chalky> Nice to be back ;-)

snorgle] Sybilla?.
Rosie] By jove - I think B'Smiths got it!
Re. the 'wine' at the end of Katherine - 'tis heard in many a Shakespearean romp - enables the acTORRRR to en-UN-ciate and prrro-JECT the name in the finest tradition of Luvvie Deliverrreh [think Brian Blessed in The Taming of the Shrew].

My first name isn't in english, to be fair. My surname starts with 3 consonants, but isn't foreign.

Oh, is it "Tchea-Fruit" like in Neopets?

Siobhan?