Your current family name is Charles?
Can your adoptive parents help in any way. I will see what I may be able to find, but my first search (without too much info) proved fruitless. Please do not give up. There will be a paper trail somewhere depending in which country you now live in.
I live in NZ so may be time difference in replies, but I will have a look for you or maybe suggest another way to search.
Give me time.
mj7777 (hopefully someone with more knowledge than myself will be able to come in on this thread)