Thanks all: lots of family names here eg Robert, Christopher, Richard. We will soon compare shortlists, there's lots if inspiration. I especially like Samuel and Leo and will keep pushing Edward as I like the king connection (which in my book trumps trains).
Ideas? DH has vetoed "obvious" other tank engines which rules out Edward, which I like. I also quite like William and George but he worries they're a bit wet. So far, all DH's suggestions have been of his 1970s classmates: Daniel, Simon, David. I don't quite think they're ready for a revival but they do indicate that Theodore (which I also like for the nns) is a bit "out there" for him. Can anyone help inspire us? Thanks in advance.