diff --git a/.mailmap b/.mailmap
index 40656f05a0e5c..32e62ce1e62df 100644
--- a/.mailmap
+++ b/.mailmap
@@ -47,7 +47,6 @@ Jeremiah Lowin <jlowin@apache.org> <jlowin@iHal.local>
 Jeremiah Lowin <jlowin@apache.org> <jlowin@Jeremiahs-MacBook-Air.local>
 Jeremiah Lowin <jlowin@apache.org> <jlowin@jlowin.local>
 Jeremiah Lowin <jlowin@apache.org> <jlowin@users.noreply.github.com>
-Jeremiah Lowin <jlowin@apache.org> <jlowin@users.noreply.github.com>
 Jiajie Zhong <zhongjiajie955@hotmail.com>
 Jorge Machado <jorge.w.machado@hotmail.com>
 Joseph Yen <joseph.yen@gmail.com>
@@ -85,7 +84,6 @@ Sevak Avetisyan <sevak.avet@gmail.com>
 Sid Anand <r39132@gmail.com> <sanand@agari.com>
 Sid Anand <r39132@gmail.com> <sianand@paypal.com>
 Sid Anand <r39132@gmail.com> <siddharthanand@yahoo.com>
-Sid Anand <r39132@gmail.com> <siddharthanand@yahoo.com>
 Sumit Maheshwari <sumeet.manit@gmail.com> <smaheshwari@twitter.com>
 Sumit Maheshwari <sumeet.manit@gmail.com> <sumitm@qubole.com>
 Tao Feng <fengtao04@gmail.com> <tfeng@lyft.com>
@@ -93,7 +91,6 @@ Tobiasz Kedzierski <tobiasz.kedzierski@polidea.com>
 Tomek Kzukowski <tomek@tomekzukowski.com>
 Tomek Urbaszek <turbaszek@apache.org> <turbaszek@gmail.com>
 Tomek Urbaszek <turbaszek@apache.org> <tomasz.urbaszek@polidea.com>
-Tomek Urbaszek <turbaszek@apache.org> <tomasz.urbaszek@polidea.com>
 Xiaodong Deng <xd_deng@hotmail.com>
 Xiaodong Deng <xd_deng@hotmail.com> <11539188+XD-DENG@users.noreply.github.com>
 Yuen-Kuei Hsueh <ph.study@gmail.com>