diff --git a/AUTHORS b/AUTHORS
index 4263eb288e..a7b292aba6 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -16,7 +16,7 @@ alphabetical order):
            John Darrington <jmd@gnu.org>
         Andreas Enge <andreas@enge.fr>
          Alírio Eyng <alirioeyng@gmail.com>
-            Guy Grant <gzg@riseup.net>
+         Joshua Grant <tadni@riseup.net>
          Raimon Grau <raimonster@gmail.com>
          Nikita Karetnikov <nikita@karetnikov.org>
         Aljosha Papsch <misc@rpapsch.de>
diff --git a/gnu/packages/fonts.scm b/gnu/packages/fonts.scm
index 7c95666c53..825395b04d 100644
--- a/gnu/packages/fonts.scm
+++ b/gnu/packages/fonts.scm
@@ -1,7 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
-;;; Copyright © 2014 Guy Grant <tadnimi@gnu.org>
+;;; Copyright © 2014 Joshua Grant <tadni@riseup.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
diff --git a/gnu/packages/gl.scm b/gnu/packages/gl.scm
index a65639bee3..bf267bfca8 100644
--- a/gnu/packages/gl.scm
+++ b/gnu/packages/gl.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2013 Andreas Enge <andreas@enge.fr>
-;;; Copyright © 2013 Guy Grant <gzg@riseup.net>
+;;; Copyright © 2013 Joshua Grant <tadni@riseup.net>
 ;;; Copyright © 2014 David Thompson <davet@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
diff --git a/gnu/packages/slim.scm b/gnu/packages/slim.scm
index 1f0d53ce60..fb77902fd3 100644
--- a/gnu/packages/slim.scm
+++ b/gnu/packages/slim.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013 Guy Grant <gzg@riseup.net>
+;;; Copyright © 2013 Joshua Grant <tadni@riseup.net>
 ;;; Copyright © 2014 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2014 Andreas Enge <andreas@enge.fr>
 ;;;