Rob Yeung's Answer:
I'm very sorry to hear that you're being made the victim of gossip at work. Your supervisor should usually be your first point of contact and I realise that you have already tried to speak to him or her. But would it be worth trying again?
Perhaps make a note of the comments you have received and approach your supervisor when the two of you have the time to consider the matter properly. Perhaps your supervisor was too busy the previous time you tried to speak or had other concerns on his or her mind. Have you tried speaking directly to the people who are gossiping about you? Of course I don't know the precise details about your situation. But sometimes, speaking directly to an "assailant" on a one-to-one basis about the impact that he or she is having on you can defuse the situation.
Some people are simply totally unaware of the impact they have on others – they may think that their comments are amusing rather than hurtful.
But if that doesn't work and your supervisor is still not supportive, you need to speak to someone within human resources. HR people are generally very supportive and tend to have good ideas as to how to tackle the situation. For example, this could involve escalating the issue to an even more senior manager.
Another suggestion would be to speak to someone outside of the organisation. In the UK, where I am based, there are charities and informal bodies that are set up to provide advice to people who are feeling bullied at work. Would there be anyone like that you could speak to at all?
Or find a lawyer to speak to. Of course, this may involve paying a fee so even a quick consultation could cost you a not insignificant amount of money.
But if the problem is intractable and the people in your team continue to harass you, your only final recourse may be a legal one to exact financial compensation from your organisation for the treatment you are receiving.