diff --git a/lib/shared/notif-utils.js b/lib/shared/notif-utils.js
index 8ad34b2a8..db8f96ff8 100644
--- a/lib/shared/notif-utils.js
+++ b/lib/shared/notif-utils.js
@@ -1,247 +1,254 @@
 // @flow
 
 import invariant from 'invariant';
 
 import {
   type MessageInfo,
   type RawMessageInfo,
   type RobotextMessageInfo,
   type MessageType,
   messageTypes,
 } from '../types/message-types';
 import type { NotifTexts, ResolvedNotifTexts } from '../types/notif-types';
 import type { ThreadInfo, ThreadType } from '../types/thread-types';
 import type { RelativeUserInfo } from '../types/user-types';
 import { prettyDate } from '../utils/date-utils';
 import type { GetENSNames } from '../utils/ens-helpers';
 import {
   ET,
   getEntityTextAsString,
+  pluralizeEntityText,
   type EntityText,
+  type UserEntity,
 } from '../utils/entity-text';
 import { promiseAll } from '../utils/promises';
 import { trimText } from '../utils/text-utils';
 import { robotextForMessageInfo } from './message-utils';
 import { messageSpecs } from './messages/message-specs';
 import { threadNoun } from './thread-utils';
 
 async function notifTextsForMessageInfo(
   messageInfos: MessageInfo[],
   threadInfo: ThreadInfo,
   getENSNames: ?GetENSNames,
 ): Promise<ResolvedNotifTexts> {
   const fullNotifTexts = await fullNotifTextsForMessageInfo(
     messageInfos,
     threadInfo,
     getENSNames,
   );
   const merged = trimText(fullNotifTexts.merged, 300);
   const body = trimText(fullNotifTexts.body, 300);
   const title = trimText(fullNotifTexts.title, 100);
   if (!fullNotifTexts.prefix) {
     return { merged, body, title };
   }
   const prefix = trimText(fullNotifTexts.prefix, 50);
   return { merged, body, title, prefix };
 }
 
 function notifTextsForEntryCreationOrEdit(
   messageInfos: $ReadOnlyArray<MessageInfo>,
   threadInfo: ThreadInfo,
 ): NotifTexts {
   const hasCreateEntry = messageInfos.some(
     messageInfo => messageInfo.type === messageTypes.CREATE_ENTRY,
   );
   const messageInfo = messageInfos[0];
 
   const thread = ET.thread({ display: 'shortName', threadInfo });
   const creator = ET.user({ userInfo: messageInfo.creator });
   const prefix = ET`${creator}`;
 
   if (!hasCreateEntry) {
     invariant(
       messageInfo.type === messageTypes.EDIT_ENTRY,
       'messageInfo should be messageTypes.EDIT_ENTRY!',
     );
     const date = prettyDate(messageInfo.date);
     let body = ET`updated the text of an event in ${thread}`;
     body = ET`${body} scheduled for ${date}: "${messageInfo.text}"`;
     const merged = ET`${prefix} ${body}`;
     return {
       merged,
       title: threadInfo.uiName,
       body,
       prefix,
     };
   }
   invariant(
     messageInfo.type === messageTypes.CREATE_ENTRY ||
       messageInfo.type === messageTypes.EDIT_ENTRY,
     'messageInfo should be messageTypes.CREATE_ENTRY/EDIT_ENTRY!',
   );
   const date = prettyDate(messageInfo.date);
   let body = ET`created an event in ${thread}`;
   body = ET`${body} scheduled for ${date}: "${messageInfo.text}"`;
   const merged = ET`${prefix} ${body}`;
   return {
     merged,
     title: threadInfo.uiName,
     body,
     prefix,
   };
 }
 
 type NotifTextsForSubthreadCreationInput = {
   +creator: RelativeUserInfo,
   +threadType: ThreadType,
   +parentThreadInfo: ThreadInfo,
   +childThreadName: ?string,
-  +childThreadUIName: EntityText | string,
+  +childThreadUIName: string | $ReadOnlyArray<UserEntity>,
 };
 function notifTextsForSubthreadCreation(
   input: NotifTextsForSubthreadCreationInput,
 ): NotifTexts {
   const {
     creator,
     threadType,
     parentThreadInfo,
     childThreadName,
     childThreadUIName,
   } = input;
 
   const prefix = ET`${ET.user({ userInfo: creator })}`;
 
   let body = `created a new ${threadNoun(threadType)}`;
   if (parentThreadInfo.name) {
     body = ET`${body} in ${parentThreadInfo.name}`;
   }
 
   let merged = ET`${prefix} ${body}`;
   if (childThreadName) {
     merged = ET`${merged} called "${childThreadName}"`;
   }
 
   return {
     merged,
     body,
     title: childThreadUIName,
     prefix,
   };
 }
 
 function mostRecentMessageInfoType(
   messageInfos: $ReadOnlyArray<MessageInfo>,
 ): MessageType {
   if (messageInfos.length === 0) {
     throw new Error('expected MessageInfo, but none present!');
   }
   return messageInfos[0].type;
 }
 
 async function fullNotifTextsForMessageInfo(
   messageInfos: $ReadOnlyArray<MessageInfo>,
   threadInfo: ThreadInfo,
   getENSNames: ?GetENSNames,
 ): Promise<ResolvedNotifTexts> {
   const mostRecentType = mostRecentMessageInfoType(messageInfos);
   const messageSpec = messageSpecs[mostRecentType];
   invariant(
     messageSpec.notificationTexts,
     `we're not aware of messageType ${mostRecentType}`,
   );
   const innerNotificationTexts = (
     innerMessageInfos: $ReadOnlyArray<MessageInfo>,
     innerThreadInfo: ThreadInfo,
   ) =>
     fullNotifTextsForMessageInfo(
       innerMessageInfos,
       innerThreadInfo,
       getENSNames,
     );
   const unresolvedNotifTexts = await messageSpec.notificationTexts(
     messageInfos,
     threadInfo,
     { notificationTexts: innerNotificationTexts },
   );
 
   const resolveToString = async (
     entityText: string | EntityText,
   ): Promise<string> => {
     if (typeof entityText === 'string') {
       return entityText;
     }
     const notifString = await getEntityTextAsString(entityText, getENSNames, {
       prefixThisThreadNounWith: 'your',
     });
     invariant(
       notifString !== null && notifString !== undefined,
       'getEntityTextAsString only returns falsey when passed falsey',
     );
     return notifString;
   };
+  const unresolvedTitle = unresolvedNotifTexts.title;
+  const pluralizedTitle =
+    typeof unresolvedTitle === 'string'
+      ? unresolvedTitle
+      : pluralizeEntityText(unresolvedTitle.map(entity => [entity]));
   let promises = {
     merged: resolveToString(unresolvedNotifTexts.merged),
     body: resolveToString(unresolvedNotifTexts.body),
-    title: resolveToString(unresolvedNotifTexts.title),
+    title: resolveToString(pluralizedTitle),
   };
   if (unresolvedNotifTexts.prefix) {
     promises = {
       ...promises,
       prefix: resolveToString(unresolvedNotifTexts.prefix),
     };
   }
   return await promiseAll(promises);
 }
 
 function notifRobotextForMessageInfo(
   messageInfo: RobotextMessageInfo,
   threadInfo: ThreadInfo,
 ): EntityText {
   const robotext = robotextForMessageInfo(messageInfo, threadInfo);
   return robotext.map(entity => {
     if (
       typeof entity !== 'string' &&
       entity.type === 'thread' &&
       entity.id === threadInfo.id
     ) {
       return ET.thread({
         display: 'shortName',
         threadInfo,
         possessive: entity.possessive,
       });
     }
     return entity;
   });
 }
 
 function notifCollapseKeyForRawMessageInfo(
   rawMessageInfo: RawMessageInfo,
 ): ?string {
   const messageSpec = messageSpecs[rawMessageInfo.type];
   return messageSpec.notificationCollapseKey?.(rawMessageInfo) ?? null;
 }
 
 type Unmerged = $ReadOnly<{
   body: string,
   title: string,
   prefix?: string,
   ...
 }>;
 type Merged = {
   body: string,
   title: string,
 };
 function mergePrefixIntoBody(unmerged: Unmerged): Merged {
   const { body, title, prefix } = unmerged;
   const merged = prefix ? `${prefix} ${body}` : body;
   return { body: merged, title };
 }
 
 export {
   notifRobotextForMessageInfo,
   notifTextsForMessageInfo,
   notifTextsForEntryCreationOrEdit,
   notifTextsForSubthreadCreation,
   notifCollapseKeyForRawMessageInfo,
   mergePrefixIntoBody,
 };
diff --git a/lib/types/notif-types.js b/lib/types/notif-types.js
index b1043ace3..eb526ebea 100644
--- a/lib/types/notif-types.js
+++ b/lib/types/notif-types.js
@@ -1,17 +1,17 @@
 // @flow
 
-import type { EntityText } from '../utils/entity-text';
+import type { EntityText, UserEntity } from '../utils/entity-text';
 
 export type NotifTexts = {
   +merged: string | EntityText,
   +body: string | EntityText,
-  +title: string | EntityText,
+  +title: string | $ReadOnlyArray<UserEntity>,
   +prefix?: string | EntityText,
 };
 
 export type ResolvedNotifTexts = {
   +merged: string,
   +body: string,
   +title: string,
   +prefix?: string,
 };