Every single person I have known with the name as well as everyone I've heard say the name has pronounced it as catreena...and I'm a Scot and an oldster.
However, as others claim above, people are, of course, free to pronounce their names however they will. For example, my partner once told me of a pupil of hers who insisted her name was See-ob-han!
Thanks for your 'call', SH.
Yes, we had a wonderful booze-cruise - as we define it...ie we drink the booze and eat the food in France rather than bringing it home in boxes and bottles! - on Friday, C.