The word “AHMAD” is found in the Dead Sea Scrolls? The Qumran manuscripts.
The word seems to have been tampered with, however we can still see the word as presented here. Links below.
Try it out yourself as a text critic :-
Look at the Aramaic alphabets in the wikipedia link given.
See how Hhet and Tav is written. Do they look similar?
See how Dalet and Khaf is written. Do they look similar?
Now create your own “AHMAD” and “ETMAK” from these alphabets.
Compare the two words. Do the words look similar.
Compare the two words with the DSS ignoring the vowels and accent ending.
Which word look similar?
Now read the whole chapter of Isaiah 42.
Even if the DSS was not tampered, was it written wrongly as the letters are very similar?
The error could have gone back even before the DSS was written.