It's not Taka. It's only a fanfiction name made up द्वारा an outsider childrens' book writer, while Scar's creators ignored his book, and downright denied it on the commentary track द्वारा calling the cub "Fluffy" instead of tieing the book in.
The film makers have never revealed their own official original name for Scar.
scar has no other name but "Scar". There's no official name दिया to Scar but a few outsiders who created TLK:SNA पुस्तकें that दिया him the name, "Taka" which is not official to डिज़्नी and is completely ignored from the Walt डिज़्नी company.