What did the Bentleys name their pet dog after?

The dog was named after an artist, El Greco.

He was too frightened to struggle, and when it was over and he stood dripping and bony and drowned-looking Philip named him. El Greco - because El Greco was an artist who had a way of painting people long and lean as if they'd all been put on the rack and stretched considerably, and if he had ever painted a dog, Philip says, it would have been just such a one as ours.