>>11382200
Numbers are important for dehumanizing bureaucracy, of course but masters shouldn't be required to memorize some long barcode. That's why you come up with cute pet names. Her hair color is a classic one or just name her after something like Bacardi. Slaves are a product for your own enjoyment after all.
Really a name isn't super necessary until you have more than one slave, you call someone's name to get their attention but your slave should already be focused on you at all times, a snap of the fingers should correct her if she slips up.