We discussed naming cats the other day.
The same rules apply to our horses.
Try not to use people names and have whatever we call the horse relate to something.
This little mare acquired a name last spring. Her mother is "Ace" so she could be "Little Ace" but that's not real original. Besides, the cats get called 'Little This or That' enough.
Look at the lacy patch of white on her forehead. Think about it and Little Ace becomes "Lace". Yup! That's her name!