diff --git a/_data/coauthors.yml b/_data/coauthors.yml
index 8ed521248d81..5a989cf01e3e 100644
--- a/_data/coauthors.yml
+++ b/_data/coauthors.yml
@@ -1,34 +1,34 @@
-"Adams":
+"adams":
   - firstname: ["Edwin", "E.", "E. P.", "Edwin Plimpton"]
     url: https://en.wikipedia.org/wiki/Edwin_Plimpton_Adams
 
-"Podolsky":
+"podolsky":
   - firstname: ["Boris", "B.", "B. Y.", "Boris Yakovlevich"]
     url: https://en.wikipedia.org/wiki/Boris_Podolsky
 
-"Rosen":
+"rosen":
   - firstname: ["Nathan", "N."]
     url: https://en.wikipedia.org/wiki/Nathan_Rosen
 
-"Bach": 
+"bach":
   - firstname: ["Johann Sebastian", "J. S."]
     url: https://en.wikipedia.org/wiki/Johann_Sebastian_Bach
 
   - firstname: ["Carl Philipp Emanuel", "C. P. E."]
     url: https://en.wikipedia.org/wiki/Carl_Philipp_Emanuel_Bach
 
-"Przibram":
+"przibram":
   - firstname: ["Karl"]
     url: https://link.springer.com/article/10.1007/s00016-019-00242-z
 
-"Schrödinger":
+"schrodinger":
   - firstname: ["Erwin"]
     url: https://en.wikipedia.org/wiki/Erwin_Schr%C3%B6dinger
 
-"Lorentz":
+"lorentz":
   - firstname: ["Hendrik Antoon"]
     url: https://en.wikipedia.org/wiki/Hendrik_Lorentz
 
-"Planck":
+"planck":
   - firstname: ["Max"]
     url: https://en.wikipedia.org/wiki/Max_Planck
diff --git a/_layouts/bib.html b/_layouts/bib.html
index 6ef0648c523f..248a90751ab6 100644
--- a/_layouts/bib.html
+++ b/_layouts/bib.html
@@ -52,8 +52,9 @@
             {%- endif -%}
           {%- endif -%}
           {%- assign coauthor_url = nil -%}
-          {%- if site.data.coauthors[author_last_name] -%}
-            {%- for coauthor in site.data.coauthors[author_last_name] -%}
+          {%- assign clean_last_name = author_last_name | downcase | remove_accents -%}
+          {%- if site.data.coauthors[clean_last_name] -%}
+            {%- for coauthor in site.data.coauthors[clean_last_name] -%}
               {%- if coauthor.firstname contains author.first -%}
                 {%- assign coauthor_url = coauthor.url -%}
                 {%- break -%}
diff --git a/_plugins/remove-accents.rb b/_plugins/remove-accents.rb
new file mode 100644
index 000000000000..2dd40a4016ac
--- /dev/null
+++ b/_plugins/remove-accents.rb
@@ -0,0 +1,32 @@
+# based on https://distresssignal.org/busting-css-cache-with-jekyll-md5-hash
+# https://gist.github.com/BryanSchuetz/2ee8c115096d7dd98f294362f6a667db
+module Jekyll
+    module CleanString
+        class RemoveAccents
+            require 'i18n'
+            I18n.config.available_locales = :en
+
+            attr_accessor :string
+
+            def initialize(string:)
+                self.string = string
+            end
+
+            def digest!
+                remove_accents
+            end
+
+            private
+
+            def remove_accents
+                I18n.transliterate(string)
+            end
+        end
+
+        def remove_accents(string)
+            RemoveAccents.new(string: string).digest!
+        end
+    end
+end
+
+Liquid::Template.register_filter(Jekyll::CleanString)
\ No newline at end of file