Permanent sutures from umbilcal hernia came out of my body on their own 2 years after surgery is this normal?

Yes. Permanent suture material becomes an irritant to some people's bodies. The suture is essentially "rejected" by the body over time. Typically, the sutures serve as a small source of chronic infection, with a small, continuous amount of whitish drainage until they are ejected from the same skin site where the pus drains. Once the material is ejected the site will finally heal over.