After contributing some weeks I noticed that the author name in my commits were incorrect. Does changing the git history with author info in the commits create any problems for my fellow contributors?
Yes it does affect other contributers. Changing author name will result in a rewrite of the history. This is because the author name is used while calculating the SHA-1 hash for your commit. For further you can see this page from github
Regarding Bart van Ingen Schenau comment how to change the username for furture commits you can do the following(thanks for your comment):
1. Reconfigure the username global:
git config --global user.name "prefered Username"
2. Reconfigure the username per single repository:
git config user.name "prefered username"
This will change the user name for future commit and will keep the username for previous commits. This will also NOT interfere other contributers.