diff --git a/.mailmap b/.mailmap
new file mode 100644
index 000000000..4031be995
--- /dev/null
+++ b/.mailmap
@@ -0,0 +1,4 @@
+Tom Donoghue <tdonoghue.research@gmail.com>
+Nicholas Seattle <nicain.seattle@gmail.com>
+Nicholas Seattle <nicain.seattle@gmail.com> <nicholasc@alleninstitute.org>
+Nile Graddis <nilegraddis@gmail.com>