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.