Just because it’s called Pythagoras theorem it doesn’t mean Pythagoras discovered it. A simple google search on who discovered Pythagoras theorem will show it was discovered atleast 1000 years before Pythagoras
Names are used for some things by popularity.
For instance if you say someone was born 100 year bc, doesn’t mean you believe in Jesus just because you used a reference
While I agree one needs to remain knowledgeable on ones own heritage and it also encourages patriotism, that shouldn’t be the main focus of our learnings.
In ancient times, the North part of India probably would have considered themselves more closer to Central Asia than to south India!
What matters is the progress done now, new discoveries and educating our children to be on the forefront on new studies irrespective of where the history of those studies came from.