Thanks Pam:-) I'm having a lot of fun with this!
Here's another:
Cat o'nine tails - A whip
In olden days, people were flogged by a nasty device made up of three separate knottings of three stands attached to the whip's handle. While the strands may have been made from the hide of cats, the multiple of 9 had already been associated with cats; presumably if a person being flogged survived, they were as lucky as a cat with 9 lives.

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"In a cat's eye, all things belong to cats." - English proverb