diff --git a/native/chat/chat-input-bar.react.js b/native/chat/chat-input-bar.react.js
--- a/native/chat/chat-input-bar.react.js
+++ b/native/chat/chat-input-bar.react.js
@@ -139,7 +139,7 @@
   +joinThread: (request: ClientThreadJoinRequest) => Promise<ThreadJoinPayload>,
   +inputState: ?InputState,
   +userSearchIndex: SearchIndex,
-  +threadMembers: $ReadOnlyArray<RelativeMemberInfo>,
+  +mentionsCandidates: $ReadOnlyArray<RelativeMemberInfo>,
   +parentThreadInfo: ?ThreadInfo,
 };
 type State = {
@@ -477,7 +477,7 @@
 
       const suggestedUsers = getTypeaheadUserSuggestions(
         this.props.userSearchIndex,
-        this.props.threadMembers,
+        this.props.mentionsCandidates,
         this.props.viewerID,
         typeaheadMatchedStrings.usernamePrefix,
       );
@@ -939,7 +939,7 @@
   const callJoinThread = useServerCall(joinThread);
 
   const userSearchIndex = useSelector(userStoreSearchIndex);
-  const threadMembers = useSelector(
+  const mentionsCandidates = useSelector(
     relativeMemberInfoSelectorForMembersOfThread(props.threadInfo.id),
   );
 
@@ -967,7 +967,7 @@
       joinThread={callJoinThread}
       inputState={inputState}
       userSearchIndex={userSearchIndex}
-      threadMembers={threadMembers}
+      mentionsCandidates={mentionsCandidates}
       parentThreadInfo={parentThreadInfo}
     />
   );
diff --git a/web/chat/chat-input-bar.react.js b/web/chat/chat-input-bar.react.js
--- a/web/chat/chat-input-bar.react.js
+++ b/web/chat/chat-input-bar.react.js
@@ -549,7 +549,7 @@
     const dispatchActionPromise = useDispatchActionPromise();
     const callJoinThread = useServerCall(joinThread);
     const userSearchIndex = useSelector(userStoreSearchIndex);
-    const threadMembers = useSelector(
+    const mentionsCandidates = useSelector(
       relativeMemberInfoSelectorForMembersOfThread(props.threadInfo.id),
     );
 
@@ -582,11 +582,11 @@
       if (props.inputState.typeaheadState.keepUpdatingThreadMembers) {
         const setter = props.inputState.setTypeaheadState;
         setter({
-          frozenThreadMembers: threadMembers,
+          frozenMentionsCandidates: mentionsCandidates,
         });
       }
     }, [
-      threadMembers,
+      mentionsCandidates,
       props.inputState.setTypeaheadState,
       props.inputState.typeaheadState.keepUpdatingThreadMembers,
     ]);
@@ -598,13 +598,13 @@
         }
         return getTypeaheadUserSuggestions(
           userSearchIndex,
-          props.inputState.typeaheadState.frozenThreadMembers,
+          props.inputState.typeaheadState.frozenMentionsCandidates,
           viewerID,
           typeaheadMatchedStrings.usernamePrefix,
         );
       }, [
         userSearchIndex,
-        props.inputState.typeaheadState.frozenThreadMembers,
+        props.inputState.typeaheadState.frozenMentionsCandidates,
         viewerID,
         typeaheadMatchedStrings,
       ]);
diff --git a/web/input/input-state-container.react.js b/web/input/input-state-container.react.js
--- a/web/input/input-state-container.react.js
+++ b/web/input/input-state-container.react.js
@@ -153,7 +153,7 @@
     typeaheadState: {
       canBeVisible: false,
       keepUpdatingThreadMembers: true,
-      frozenThreadMembers: [],
+      frozenMentionsCandidates: [],
       moveChoiceUp: null,
       moveChoiceDown: null,
       close: null,
diff --git a/web/input/input-state.js b/web/input/input-state.js
--- a/web/input/input-state.js
+++ b/web/input/input-state.js
@@ -37,7 +37,7 @@
 export type TypeaheadState = {
   +canBeVisible: boolean,
   +keepUpdatingThreadMembers: boolean,
-  +frozenThreadMembers: $ReadOnlyArray<RelativeMemberInfo>,
+  +frozenMentionsCandidates: $ReadOnlyArray<RelativeMemberInfo>,
   +moveChoiceUp: ?() => void,
   +moveChoiceDown: ?() => void,
   +close: ?() => void,