Is there a way to change a SVN users username through the entire repository history?

Question

When my team first started out with SVN we all just used our first names when committing to the repository, however, now that our team has grown, we are running into issues

Answer 1

You can use svndumptool:

svnadmin dump path/to/my/repo > repo.dump

svndumptool transform-revprop svn:author originalregexp newvalue repo.dump newrepo.dump