diff --git a/.mailmap b/.mailmap
index 6bceaf16ac..b955a20486 100644
--- a/.mailmap
+++ b/.mailmap
@@ -48,6 +48,7 @@ Mathieu Lirzin <mthl@gnu.org> <mathieu.lirzin@openmailbox.org>
 Mathieu Othacehe <m.othacehe@gmail.com>
 Mathieu Othacehe <mathieu.othacehe@parrot.com>
 Mathieu Othacehe <othacehe@gnu.org>
+Matthew James Kraai <kraai@ftbfs.org>
 Nikita Karetnikov <nikita@karetnikov.org> <nikita.karetnikov@gmail.com>
 nikita <nikita@n0.is>
 nikita <nikita@n0.is> ng0 <ng0@n0.is>
diff --git a/gnu/packages/lisp-xyz.scm b/gnu/packages/lisp-xyz.scm
index c4c63958c9..f7683d9dbf 100644
--- a/gnu/packages/lisp-xyz.scm
+++ b/gnu/packages/lisp-xyz.scm
@@ -22,7 +22,7 @@
 ;;; Copyright © 2020, 2021 Adam Kandur <rndd@tuta.io>
 ;;; Copyright © 2020, 2021 Sharlatan Hellseher <sharlatanus@gmail.com>
 ;;; Copyright © 2021 Aurora <rind38@disroot.org>
-;;; Copyright © 2021 Matthew Kraai <kraai@ftbfs.org>
+;;; Copyright © 2021 Matthew James Kraai <kraai@ftbfs.org>
 ;;; Copyright © 2021 André A. Gomes <andremegafone@gmail.com>
 ;;; Copyright © 2021 Cage <cage-dev@twistfold.it>
 ;;; Copyright © 2021 Cameron Chaparro <cameron@cameronchaparro.com>
diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index f16bff460a..7fdd864a40 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -77,7 +77,7 @@
 ;;; Copyright © 2020, 2021 Alexandros Theodotou <alex@zrythm.org>
 ;;; Copyright © 2020 Lars-Dominik Braun <ldb@leibniz-psychology.org>
 ;;; Copyright © 2020 Alex ter Weele <alex.ter.weele@gmail.com>
-;;; Copyright © 2020 Matthew Kraai <kraai@ftbfs.org>
+;;; Copyright © 2020 Matthew James Kraai <kraai@ftbfs.org>
 ;;; Copyright © 2020 Ryan Prior <rprior@protonmail.com>
 ;;; Copyright © 2020 Josh Holland <josh@inv.alid.pw>
 ;;; Copyright © 2020 Yuval Kogman <nothingmuch@woobling.org>
diff --git a/gnu/packages/rust.scm b/gnu/packages/rust.scm
index 56e6e720c0..73f94a3929 100644
--- a/gnu/packages/rust.scm
+++ b/gnu/packages/rust.scm
@@ -10,7 +10,7 @@
 ;;; Copyright © 2019 Ivan Petkov <ivanppetkov@gmail.com>
 ;;; Copyright © 2020, 2021 Jakub Kądziołka <kuba@kadziolka.net>
 ;;; Copyright © 2020 Pierre Langlois <pierre.langlois@gmx.com>
-;;; Copyright © 2020 Matthew Kraai <kraai@ftbfs.org>
+;;; Copyright © 2020 Matthew James Kraai <kraai@ftbfs.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;