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B&w cats reminded me of the Frisian cows so "moo" sprang to mind ,although it seemed too primary, after some research the Egyptian name for cats(they were fairly keen on cats) was mau as this is about as close to moo and meow as it gets it's got my vote.
Other considerations were
1 chi chi ( always handy for calling the cat in )
2 b&w ( didn't roll of the tongue too well) one has to consider the neighbours when calling you loved one in for tea)
3 rzole ( see consideration 2 )