With further research i found, how i can add new license & only my name in output src-code : for-example, if a dev-2 first converts Python/Go/C# src into equivalent software algorithm, flow charts, blocks, etc, & then if i use only those materials produced by dev-2 (w/o using input src), & create new C++ src-code with my hand, eye, brain manually, then it is a CLEAN-ROOM DESIGN conversion, and in such case, i can add my name, & previous copyright-holder names do not need to be added, and i can also choose a new license.

i understand what you're saying/suggesting , but this has been already edited , and i need to do one last edit, its very important.

my EDITs are IMPROVEMENTS , they do not create conflict in my answer or any one's answer.

why did you revert my new changes ? ! i added NUMBER for QUESTIONS.

Thank You again Bart . I made few mistakes in EDIT section info/data earlier, which are now corrected.