The proper pronunciation is "iss". It is pronounced this way in Scotland. It is a mispronunciation to say "ish".
Chris-iss
Start by dividing the word up into : "Iss-a-char"Then, :-pronounce 'Iss' as in "Miss' but without the M as in '[M]iss'- 'a' as in the 'u' in 'but'-'char' as if it is spelt 'car' but pronounce it with a gutteral 'c' as in 'kar'Last but not least, put the stress on the first syllable ie on 'Iss'
Answer... Peer -i - form - iss
Ish-you
Scoo-ish
Rug- Anne- Iss
co- KET-ish
ice-iss (the second "s" is meant to be there)
iss roon ae
Gorlois is pronounced as GOR-loh-iss.
Ish-Us
Isolde is pronounced Iss-ol-dur.