This is the 3915th most frequent Russian word.
ганн
The word "ганн" does not have a meaning in Russian; it might be a misspelling or a transliteration error.
Here, 'ганн' is used as a proper noun, referring to a person's name.
Ганн был известным инженером в Петербурге.
Gann was a famous engineer in St. Petersburg.
In this sentence, 'ганн' also refers to the proper noun, specifically relating to someone named Gann and his project.
Вы читали новости о проекте Ганна?
Have you read the news about Gann's project?
Again, 'ганн' is serving as a proper noun, identifying the person credited for an action.