I don't know if they'd count as unusual but I had a series of small merchant ships named as a play on words. The two that come to me off the top of my head are:
Lost Prophets (the first ship, prototype so no standard design discount, wouldn't make the payments, had to be bought outright out of past profits)
Chants of a Prophet (the second, standard design discount savings, should make the payments)
...I thought them amusing and fun
Can't recall the others I came up with off hand, they may be scribbled down somewhere. I think I ran out of "Prophet" themes and went off on a tangent, but I can't even recall what the tangent was at the moment.
BTW Hans, I thought I'd heard the name Dawn Trader in connection with Traveller before, dug up the reference below. That and yours wouldn't be connected would they? Or maybe both just owe thier origins to the Dawn Treader. Just curious. I also seem to recall a Dawn Trader mention in TNE somewhere.
Dawn Trader mention: http://traveller.wikia.com/wiki/Ghost_Fleet