So pretty, though it might be a bit of a mouthful for a real name. Despite this, it has a cute nickname in the form of Ash, and could work if the person in question has a larger than life personality.
This name sounds hideous. It's merely a bastardization of the beautiful name Ishtar. Not only that, but Ashtoreth was used by the ancient Hebrews to mock the Babylonians. It also sounds demonic.
Ashtoreth is actually the plural of Ashtaroth. An ashtaroth is a type of totem pole associated with the worship of Astarte. Astarte was the Phoenecian goddess referred to above. Ashtaroth is also a biblical land area associated with Og of Bashan.