I've explained it before, but I'll do it again anyway.
My first car was a 1985 1.1L Fiesta. Somewhere around Draffan, on the way home from Hertfordshire late at night, I was so impressed by how well she drove compared to various other bangers I'd done that drive in that she became Miranda - she who is worthy to be admired.
My second car was also a Fiesta, a 1993 XR2. Obviously he was a boy because he was a boy racer, and he had to be Ferdinand to match Miranda.
My third car was a 1998 Peugeot 306 GTi6 and became Ariel, following on the Tempest theme.
My fourth car was a 2009 Golf GTi Mk6, who really did look very prosperous, even expensive, and of course he was Prospero. I remarked at some point that I was running out of names and it looked very much as if Prospero's successor would have to be Caliban.
When I picked up my MG4 my dealer downloaded iSmart for me and bound my phone to the car. He asked me the car's name. In a moment of euphoria and what-the-hell, I said "Caliban". And there it is, it's his name on iSmart.