Here's why:
* "Gr" is a common transliteration for "Gr" in English.
* "a" in "ham" is often transliterated as "э" (e) in Russian, but in this case, it sounds closer to "а" (a).
* "m" is transliterated as "м" (m).
However, it's important to note that this is just a transliteration, and the pronunciation might be slightly different in Russian.