diff --git a/tools/mkauthors b/tools/mkauthors
index c52adb907..b41ec6c47 100755
--- a/tools/mkauthors
+++ b/tools/mkauthors
@@ -30,14 +30,23 @@ use lib dirname $RealDir;
 use make::common;
 use make::console;
 
+my %committers;
+for my $committer (split /\n+/, `git log --pretty='%an <%ae>%n%(trailers:key=Co-Authored-By,valueonly)' HEAD`) {
+	$committers{$committer} ||= 0;
+	$committers{$committer} += 1;
+}
+
 my %authors;
-for my $author (split /\n+/, `git log --pretty='%aN <%aE>%n%(trailers:key=Co-Authored-By,valueonly)' HEAD`) {
+for my $committer (keys %committers) {
+	open(my $fh, '-|', 'git', 'check-mailmap', $committer);
+	chomp(my $author = <$fh>);
+	close $fh;
+
 	$author = $1 if $author =~ /^(.+) <(?:unknown\@email.invalid|\S+\@users.noreply.github.com)>$/;
 	next if $author =~ /\[bot\]$/;
 
-	$author =~ s/\.$//g;
 	$authors{$author} ||= 0;
-	$authors{$author} += 1;
+	$authors{$author} += $committers{$committer};
 }
 
 my $author_file = catfile dirname($RealDir), 'docs', 'AUTHORS.txt';
diff --git a/tools/mkheaders b/tools/mkheaders
index 336615b67..d244f5cbc 100755
--- a/tools/mkheaders
+++ b/tools/mkheaders
@@ -33,10 +33,8 @@ use make::common;
 use make::console;
 
 my @ignored_revisions = (
-	'0b4285abd12323920d92fee51e199edd7527dbec', # adding copyright headers
 	'46a39046196f55b52336e19662bb7bac85b731ac', # adding copyright headers
 	'4a6fedd9324d87349a806c9c1d0ae6e7d3c1fd38', # mass-updating descriptions
-	'56375392ba94f2552bbeeeab4fd39e1e50295525', # sadie's name change
 	'bab14f0dd2345c9d7dcbc47c918563709e1ac094', # peavey breaking line endings
 	'de6d4dbd1e8845e08c2d87cd89a919e5b21ba619', # jsoref fixing a ton of typos
 	'f2acdbc3820f0f4f5ef76a0a64e73d2a320df91f', # peavey fixing line endings
@@ -123,7 +121,9 @@ for my $path (@paths) {
 				push @{$authors{$display}}, $commits{$commit}->{YEAR};
 				my $details = `git rev-list --format=%B --max-count=1 $commit`;
 				while ($details =~ /co-authored-by: ([^<]+<[^>]+>)/gi) {
-					my $coauthor = $1;
+					open(my $fh, '-|', 'git', 'check-mailmap', $1);
+					chomp(my $coauthor = <$fh>);
+					close $fh;
 					my $year = $details =~ /co-authored-year: (\d+)/i ? $1 : $commits{$commit}->{YEAR};
 					$authors{$coauthor} //= [];
 					push @{$authors{$coauthor}}, $year;