I just throw an "atta girl" or a "good job girl" to her once in a while, with a reassuring rub of the dashboard. But haven't actually committed to naming her...
My sister names vehicles based on license plates. Back when I lived in VA the first three characters on my '86 Toyota Pickup were "JOQ" so it was named Jacques. In keeping with that tradition my P5 has earned the name Ella due to the first three letters of my OH plate being "ELA". My truck's new OH plates start with the same three letters (registered them back-to-back) but it will forever be Jacques to me.
If i named mine after my license plate i have no idea what it would be. its 349 PGW and I have no clue what PGW could be ha ha. I could make it stand for something i guess like Protege Goes Whooosh ha ha. (It really doesnt lol)