Re my bass rebec: I was short of money and had to sell him but he went to a very good home where he was to be played professionally, in an early music group.
The clarsach definitely counts! The word means
small harp and they were known as long ago as the eigth century.
A psaltery is an ancient instrument too, but the bowed version may be a bit of a fake. It consists of a triangular box shaped instrument with strings but no frets so the strings are just a series of open ones. The old plucked psaltery has a long history and it is perfectly possible that bowed versions existed. They have a sound rather like liquid silver if that makes sense.