diff --git a/src/services/githubApi.js b/src/services/githubApi.js
index 9e4376f..8e4dc23 100644
--- a/src/services/githubApi.js
+++ b/src/services/githubApi.js
@@ -124,7 +124,7 @@ export function buildGithubContentsApiUrl(owner, repo, path, ref) {
 }
 
 export function buildGithubContributorsApiUrl(owner, repo, page, perPage = 100) {
-  return `${API_BASE}/repos/${owner}/${repo}/contributors?per_page=${perPage}&page=${page}`;
+  return `${API_BASE}/repos/${owner}/${repo}/contributors?anon=1&per_page=${perPage}&page=${page}`;
 }
 
 export function buildGithubUserApiUrl(login) {
diff --git a/src/services/githubImporter.js b/src/services/githubImporter.js
index 5773f87..dd39e8f 100644
--- a/src/services/githubImporter.js
+++ b/src/services/githubImporter.js
@@ -31,6 +31,7 @@ import {
   extractCoAuthorNamesFromCommitMessage,
   fetchContributorAuthors,
   resolveContributorFallbackLimit,
+  buildContributorAuthorInput,
 } from './githubImporterContributors.js';
 import { dedupeAuthors } from './githubImporterAuthors.js';
 import { addCitationConsistencyWarnings, mergeMetadata } from './githubImporterMerge.js';
@@ -716,7 +717,7 @@ export async function importGithubMetadata(repoUrl, options = {}) {
     fetchOptionalJson,
     extractOrcidFromGithubProfile,
   });
-  const coAuthorAuthors = normalizeAuthors(commitCoAuthorNames.map((name) => normalizeAuthor({ name })));
+  const coAuthorAuthors = normalizeAuthors(commitCoAuthorNames.map((name) => normalizeAuthor(buildContributorAuthorInput(name))));
   const contributors = dedupeAuthors([
     ...coAuthorAuthors,
     ...contributorResult.fallbackAuthors.filter(Boolean),
diff --git a/src/services/githubImporterContributors.js b/src/services/githubImporterContributors.js
index 3c63d18..782892e 100644
--- a/src/services/githubImporterContributors.js
+++ b/src/services/githubImporterContributors.js
@@ -10,6 +10,12 @@ const TOP_CONTRIBUTOR_FALLBACK_LIMIT = 4;
 const MAX_CONTRIBUTOR_FALLBACK_LIMIT = 20;
 const GITHUB_PAGE_SIZE = 100;
 
+export function buildContributorAuthorInput(name, extra = {}) {
+  const trimmed = String(name ?? '').trim();
+  const hyphenatedName = trimmed.includes('-') && trimmed.split('-').every((segment) => /^[A-Z][a-z]+$/.test(segment));
+  return hyphenatedName ? { familyNames: trimmed, ...extra } : { name: trimmed, ...extra };
+}
+
 function isAutomatedContributorIdentity(value, cleanString) {
   const text = cleanString(value ?? '').trim();
   if (!text) {
@@ -102,7 +108,8 @@ function isAutomatedContributor(contributor, profile, cleanString) {
   const profileType = cleanString(profile?.type ?? '').toLowerCase();
   const profileName = cleanString(profile?.name ?? '').toLowerCase();
 
-  if ((contributorType && contributorType !== 'user') || (profileType && profileType !== 'user')) {
+  if ((contributorType && contributorType !== 'user' && contributorType !== 'anonymous')
+    || (profileType && profileType !== 'user' && profileType !== 'anonymous')) {
     return true;
   }
 
@@ -237,13 +244,18 @@ export async function fetchContributorAuthors({
     contributors.map(async (contributor) => {
       const login = cleanString(contributor?.login ?? '');
       if (!login) {
+        const name = cleanString(contributor?.name ?? '');
+        const excludedAutomated = isAutomatedContributor(contributor, null, cleanString)
+          || isAutomatedContributorIdentity(name, cleanString);
         return {
           contributor,
           profile: null,
           socialAccounts: [],
-          author: null,
+          author: excludedAutomated || !name || /\d/.test(name)
+            || (name.includes('-') && !name.split('-').every((segment) => /^[A-Z][a-z]+$/.test(segment)))
+            ? null : normalizeAuthor(buildContributorAuthorInput(name)),
           autoFilledOrcid: false,
-          excludedAutomated: false,
+          excludedAutomated,
         };
       }
 
@@ -310,7 +322,7 @@ export async function fetchContributorAuthors({
           profile,
           socialAccounts,
           author: normalizeAuthor({
-            name: profile.name,
+            ...buildContributorAuthorInput(profile.name),
             affiliation: profile.company ?? '',
             orcid: profileOrcid,
           }),
diff --git a/tests/services/anonymousContributors.test.js b/tests/services/anonymousContributors.test.js
new file mode 100644
index 0000000..6b3d2d6
--- /dev/null
+++ b/tests/services/anonymousContributors.test.js
@@ -0,0 +1,32 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import { buildContributorAuthorInput, fetchContributorAuthors } from '../../src/services/githubImporterContributors.js';
+import { cleanString, normalizeAuthor, normalizeAuthors } from '../../src/services/githubImporterUtils.js';
+
+test('anonymous humans and hyphenated names survive, but bots and handles do not', async () => {
+  const result = await fetchContributorAuthors({
+    owner: 'test-owner', repo: 'test-repo', warnings: [], contributorFallbackLimit: 5,
+    cleanString, normalizeAuthor, normalizeAuthors, addWarning: () => {},
+    fetchOptionalJson: async (url) => {
+      if (url.includes('/contributors?')) {
+        return [
+          { name: 'Anne-Marie', type: 'Anonymous' },
+          { name: 'Dana Example', type: 'Anonymous' },
+          { name: 'copilot-agent', type: 'Anonymous' },
+          { name: 'jane-doe', type: 'Anonymous' },
+          { name: 'Automation', type: 'Bot' },
+        ];
+      }
+      throw new Error(`Unexpected URL: ${url}`);
+    },
+    extractOrcidFromGithubProfile: () => '',
+  });
+  assert.deepEqual(result.fallbackAuthors.map((author) => author.familyNames), ['Anne-Marie', 'Example']);
+});
+
+test('GitHub-specific hyphen preservation leaves shared metadata normalization unchanged', () => {
+  assert.equal(normalizeAuthor(buildContributorAuthorInput('Anne-Marie')).familyNames, 'Anne-Marie');
+  assert.equal(normalizeAuthor({ name: 'Anne-Marie' }).familyNames, 'Marie');
+  assert.equal(normalizeAuthor(buildContributorAuthorInput('jane-doe')).familyNames, 'Doe');
+});
\ No newline at end of file