How to merge Users on Mercurial?

I have imported our SVN repository into Mercurial and now we have entries for the same user that don't match.

e,g, for me I have

Sam Mackrill smackrill 开发者_开发百科SMackrill

is there are way to merge these into one user?

What tools do you use for importing? If it was hg convert or hgsubversion extension, then you can re-import your data providing an up-to-date authors file, that handles various names for the same person. See the --authors option of those Mercurial commands.