diff --git a/.mailmap b/.mailmap
index 5aa1eef46..64e02681e 100644
--- a/.mailmap
+++ b/.mailmap
@@ -70,6 +70,7 @@ Rob Norris <robn@despairlabs.com>
 Rob Norris <rob.norris@klarasystems.com>
 Sam Lunt <samuel.j.lunt@gmail.com>
 Sanjeev Bagewadi <sanjeev.bagewadi@gmail.com>
+Sebastian Wuerl <s.wuerl@mailbox.org>
 Stoiko Ivanov <github@nomore.at>
 Tamas TEVESZ <ice@extreme.hu>
 WHR <msl0000023508@gmail.com>
@@ -78,6 +79,7 @@ Youzhong Yang <youzhong@gmail.com>
 
 # Signed-off-by: overriding Author:
 Ryan <errornointernet@envs.net> <error.nointernet@gmail.com>
+Sietse <sietse@wizdom.nu> <uglymotha@wizdom.nu>
 Qiuhao Chen <chenqiuhao1997@gmail.com> <haohao0924@126.com>
 Yuxin Wang <yuxinwang9999@gmail.com> <Bi11gates9999@gmail.com>
 Zhenlei Huang <zlei@FreeBSD.org> <zlei.huang@gmail.com>
diff --git a/AUTHORS b/AUTHORS
index 6a5cc088e..b4342f691 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -423,6 +423,7 @@ CONTRIBUTORS:
     Mathieu Velten <matmaul@gmail.com>
     Matt Fiddaman <github@m.fiddaman.uk>
     Matthew Ahrens <matt@delphix.com>
+    Matthew Heller <matthew.f.heller@gmail.com>
     Matthew Thode <mthode@mthode.org>
     Matthias Blankertz <matthias@blankertz.org>
     Matt Johnston <matt@fugro-fsi.com.au>
@@ -562,6 +563,7 @@ CONTRIBUTORS:
     Scot W. Stevenson <scot.stevenson@gmail.com>
     Sean Eric Fagan <sef@ixsystems.com>
     Sebastian Gottschall <s.gottschall@dd-wrt.com>
+    Sebastian Wuerl <s.wuerl@mailbox.org>
     Sebastien Roy <seb@delphix.com>
     Sen Haerens <sen@senhaerens.be>
     Serapheim Dimitropoulos <serapheim@delphix.com>
@@ -574,6 +576,7 @@ CONTRIBUTORS:
     Shawn Bayern <sbayern@law.fsu.edu>
     Shengqi Chen <harry-chen@outlook.com>
     Shen Yan <shenyanxxxy@qq.com>
+    Sietse <sietse@wizdom.nu>
     Simon Guest <simon.guest@tesujimath.org>
     Simon Klinkert <simon.klinkert@gmail.com>
     Sowrabha Gopal <sowrabha.gopal@delphix.com>
@@ -629,6 +632,7 @@ CONTRIBUTORS:
     Trevor Bautista <trevrb@trevrb.net>
     Trey Dockendorf <treydock@gmail.com>
     Troels Nørgaard <tnn@tradeshift.com>
+    tstabrawa <tstabrawa@users.noreply.github.com>
     Tulsi Jain <tulsi.jain@delphix.com>
     Turbo Fredriksson <turbo@bayour.com>
     Tyler J. Stachecki <stachecki.tyler@gmail.com>