Word Ways —> Treesong.
Source: npl-folk email from Treesong.
I chose it because I thought 'Howard Alan Treesong' (from the space opera series 'The Five Demon Princes' by Jack Vance) was the most beautiful name in SF– in fact, all fiction. HAT, incidentally, was a villain, one of the five, and didn't show up until the last of the series. He turned out to be a rather petty and easily defeated guy; Vance seems to have lost interest during the decades between #3 and #4 of the series.