The law in Thailand does not support the policy, and to change the name to do process. It is history you will change immediately. I think it's impossible. You need to think about more than the requirements of you Dua itself.
Thailand is not supported in law, policy and name change must be made in stages. It requires a background check. You will immediately switch I think it is impossible. You have missed the majority over to our own Dua.
Thai law is not supported on this policy and name change to make step. It must have a background check. You can change it immediately. I think it's impossible. You need to think about the public more than your need Dua.