According to this Welsh language cheat-sheet (
http://www.clwbmalucachu.co.uk/cheat/cheat_alphabet.htm) the correct pronunciation would be KA-ris. The 'a' is a short 'a' as in 'hat'; 'i' is not fully pronounced and is partway between 'e', 'i' and a schwa (neutral vowel sound).
:-)
♦ Chrisell ♦
All we have to decide is what to do with the time that is given us. - J.R.R. Tolkien.