We called our Leaf "Charlotte", initially because the voice that comes out of it is very like Charlotte Green's. There were other reasons: I have a very good cycling pal named Charlotte, whose hair at one time matched the red colouring of our car. Another wag off our cycle forum made a derogatory remark about it resembling the cyclist Charlotte because both "thrived on battery power", but he was just being rude.
My nieces named my LEAF Casper a year or so because it was white, quiet and friendly to them. Last weekend they saw my Blue Outlander for the first time and decided it looked like a Billy but because it lived up in the hills they named it HillBilly.