diff --git a/functions/src/__tests__/organizer-name-sync.test.ts b/functions/src/__tests__/organizer-name-sync.test.ts
new file mode 100644
index 0000000..d37657d
--- /dev/null
+++ b/functions/src/__tests__/organizer-name-sync.test.ts
@@ -0,0 +1,49 @@
+import "./setup";
+import { afterAll, beforeEach, describe, expect, it } from "vitest";
+import { db } from "../platform";
+import { onUserUpdated } from "../users";
+import { captureSnapshot, deliverWritten, newEventId, purge } from "./helpers";
+
+// A meetup keeps its organizer's name and photo, shown as "Organized by …".
+// onUserUpdated copied a new name onto posts, comments, rosters and the rest,
+// but not onto the meetups the person organizes, which kept the old name until
+// the meetup itself was edited.
+
+const ORGANIZER = "rename-organizer";
+const SOMEONE_ELSE = "rename-someone-else";
+const USER = `users/${ORGANIZER}`;
+const THEIRS = "meetups/rename-theirs";
+const NOT_THEIRS = "meetups/rename-not-theirs";
+const POST = "posts/rename-post";
+const OLD_PHOTO = "https://res.cloudinary.com/demo/image/upload/old.jpg";
+const NEW_PHOTO = "https://res.cloudinary.com/demo/image/upload/new.jpg";
+
+async function wipe() {
+  await purge(USER, THEIRS, NOT_THEIRS, POST);
+}
+
+beforeEach(async () => {
+  await wipe();
+  await db.doc(USER).set({ displayName: "Old Name", avatarUrl: OLD_PHOTO });
+  await db.doc(THEIRS).set({ organizerId: ORGANIZER, organizerName: "Old Name", organizerAvatar: OLD_PHOTO, title: "Theirs", status: "upcoming" });
+  await db.doc(NOT_THEIRS).set({ organizerId: SOMEONE_ELSE, organizerName: "Someone Else", organizerAvatar: OLD_PHOTO, title: "Not theirs", status: "upcoming" });
+  await db.doc(POST).set({ authorId: ORGANIZER, authorName: "Old Name", authorAvatar: OLD_PHOTO, text: "a post" });
+});
+afterAll(wipe);
+
+describe("a renamed organizer", () => {
+  it("is named, with the new photo, on the meetups they organize", async () => {
+    const before = await captureSnapshot(USER);
+    await db.doc(USER).update({ displayName: "New Name", avatarUrl: NEW_PHOTO });
+    const after = await captureSnapshot(USER);
+
+    await deliverWritten(onUserUpdated, before, after, { userId: ORGANIZER }, newEventId("user"));
+
+    const theirs = (await db.doc(THEIRS).get()).data();
+    expect([theirs?.organizerName, theirs?.organizerAvatar]).toEqual(["New Name", NEW_PHOTO]);
+    const post = (await db.doc(POST).get()).data();
+    expect([post?.authorName, post?.authorAvatar]).toEqual(["New Name", NEW_PHOTO]);
+    const notTheirs = (await db.doc(NOT_THEIRS).get()).data();
+    expect(notTheirs?.organizerName, "someone else's meetup changed").toBe("Someone Else");
+  });
+});
diff --git a/functions/src/users.ts b/functions/src/users.ts
index bd7c3da..62fd2de 100644
--- a/functions/src/users.ts
+++ b/functions/src/users.ts
@@ -194,6 +194,14 @@ export const onUserUpdated = onDocumentWritten(
     if (nameChanged) checkinFields.userName = after.displayName;
     if (avatarChanged) checkinFields.userAvatar = after.avatarUrl;
 
+    // The meetups they organize carry their name and photo as well, shown as
+    // "Organized by …". updateMeetupCallable refreshed those only when the
+    // meetup itself was edited, so a renamed organizer kept the old name on
+    // every meetup they had not touched since.
+    const organizerFields: Record<string, string> = {};
+    if (nameChanged) organizerFields.organizerName = after.displayName;
+    if (avatarChanged) organizerFields.organizerAvatar = after.avatarUrl;
+
     const syncTasks: Array<[string, () => Promise<void>]> = [
       ["posts", () => syncCollection(db.collection("posts").where("authorId", "==", userId), postFields)],
       ["comments", () => syncCollection(db.collectionGroup("comments").where("authorId", "==", userId), commentFields)],
@@ -203,6 +211,7 @@ export const onUserUpdated = onDocumentWritten(
       ["family", () => syncCollection(db.collectionGroup("family").where("userId", "==", userId), familyFields)],
       ["followers", () => syncCollection(db.collectionGroup("followers").where("userId", "==", userId), followerMirrorFields)],
       ["checkins", () => syncCollection(db.collectionGroup("checkins").where("userId", "==", userId), checkinFields)],
+      ["meetups", () => syncCollection(db.collection("meetups").where("organizerId", "==", userId), organizerFields)],
     ];
 
     const syncFailures = await Promise.all(