Steve Schwartz, on my query about Tilson:

>I think it's actually his middle name, but he would like to affect a
>British "double-barrelled" one.

My impression is that double-barrelled names are - or perhaps, were
- considered more socially important if they're not hyphenated, as in
Vaughan Williams as opposed to Coleridge-Taylor, so he's made the "right"
choice.

Richard Pennycuick