diff --git a/lib/permissions/minimally-encoded-thread-permissions-validators.js b/lib/permissions/minimally-encoded-thread-permissions-validators.js
--- a/lib/permissions/minimally-encoded-thread-permissions-validators.js
+++ b/lib/permissions/minimally-encoded-thread-permissions-validators.js
@@ -15,7 +15,7 @@
   MinimallyEncodedThreadInfo,
 } from '../types/minimally-encoded-thread-permissions-types.js';
 import {
-  memberInfoValidator,
+  legacyMemberInfoValidator,
   rawThreadInfoValidator,
   legacyRoleInfoValidator,
   threadCurrentUserInfoValidator,
@@ -39,7 +39,7 @@
 
 const minimallyEncodedMemberInfoValidator: TInterface<MinimallyEncodedMemberInfo> =
   tShape<MinimallyEncodedMemberInfo>({
-    ...memberInfoValidator.meta.props,
+    ...legacyMemberInfoValidator.meta.props,
     minimallyEncoded: tBool(true),
     permissions: tHexEncodedPermissionsBitmask,
   });
diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -84,7 +84,7 @@
 import {
   type RawThreadInfo,
   type ThreadInfo,
-  type MemberInfo,
+  type LegacyMemberInfo,
   type ServerThreadInfo,
   type RelativeMemberInfo,
   type ThreadCurrentUserInfo,
@@ -278,7 +278,7 @@
 
 function threadActualMembers(
   memberInfos: $ReadOnlyArray<
-    | MemberInfo
+    | LegacyMemberInfo
     | RelativeMemberInfo
     | MinimallyEncodedMemberInfo
     | MinimallyEncodedRelativeMemberInfo,
@@ -291,7 +291,7 @@
 
 function threadOtherMembers<
   T:
-    | MemberInfo
+    | LegacyMemberInfo
     | RelativeMemberInfo
     | MinimallyEncodedMemberInfo
     | MinimallyEncodedRelativeMemberInfo,
@@ -1139,7 +1139,7 @@
 function memberIsAdmin(
   memberInfo:
     | RelativeMemberInfo
-    | MemberInfo
+    | LegacyMemberInfo
     | MinimallyEncodedMemberInfo
     | MinimallyEncodedRelativeMemberInfo,
   threadInfo:
@@ -1158,7 +1158,7 @@
 function memberHasAdminPowers(
   memberInfo:
     | RelativeMemberInfo
-    | MemberInfo
+    | LegacyMemberInfo
     | ServerMemberInfo
     | MinimallyEncodedMemberInfo
     | MinimallyEncodedRelativeMemberInfo,
diff --git a/lib/types/minimally-encoded-thread-permissions-types.js b/lib/types/minimally-encoded-thread-permissions-types.js
--- a/lib/types/minimally-encoded-thread-permissions-types.js
+++ b/lib/types/minimally-encoded-thread-permissions-types.js
@@ -3,7 +3,7 @@
 import _mapValues from 'lodash/fp/mapValues.js';
 
 import type {
-  MemberInfo,
+  LegacyMemberInfo,
   RawThreadInfo,
   RelativeMemberInfo,
   LegacyRoleInfo,
@@ -70,13 +70,13 @@
 };
 
 export type MinimallyEncodedMemberInfo = $ReadOnly<{
-  ...MemberInfo,
+  ...LegacyMemberInfo,
   +minimallyEncoded: true,
   +permissions: string,
 }>;
 
 const minimallyEncodeMemberInfo = (
-  memberInfo: MemberInfo,
+  memberInfo: LegacyMemberInfo,
 ): MinimallyEncodedMemberInfo => ({
   ...memberInfo,
   minimallyEncoded: true,
@@ -85,7 +85,7 @@
 
 const decodeMinimallyEncodedMemberInfo = (
   minimallyEncodedMemberInfo: MinimallyEncodedMemberInfo,
-): MemberInfo => {
+): LegacyMemberInfo => {
   const { minimallyEncoded, ...rest } = minimallyEncodedMemberInfo;
   return {
     ...rest,
diff --git a/lib/types/thread-types.js b/lib/types/thread-types.js
--- a/lib/types/thread-types.js
+++ b/lib/types/thread-types.js
@@ -39,26 +39,27 @@
 } from '../utils/entity-text.js';
 import { tID, tShape } from '../utils/validation-utils.js';
 
-export type MemberInfo = {
+export type LegacyMemberInfo = {
   +id: string,
   +role: ?string,
   +permissions: ThreadPermissionsInfo,
   +isSender: boolean,
 };
-export const memberInfoValidator: TInterface<MemberInfo> = tShape<MemberInfo>({
-  id: t.String,
-  role: t.maybe(tID),
-  permissions: threadPermissionsInfoValidator,
-  isSender: t.Boolean,
-});
+export const legacyMemberInfoValidator: TInterface<LegacyMemberInfo> =
+  tShape<LegacyMemberInfo>({
+    id: t.String,
+    role: t.maybe(tID),
+    permissions: threadPermissionsInfoValidator,
+    isSender: t.Boolean,
+  });
 
 export type RelativeMemberInfo = $ReadOnly<{
-  ...MemberInfo,
+  ...LegacyMemberInfo,
   +username: ?string,
   +isViewer: boolean,
 }>;
 const relativeMemberInfoValidator = tShape<RelativeMemberInfo>({
-  ...memberInfoValidator.meta.props,
+  ...legacyMemberInfoValidator.meta.props,
   username: t.maybe(t.String),
   isViewer: t.Boolean,
 });
@@ -104,7 +105,7 @@
   +parentThreadID: ?string,
   +containingThreadID: ?string,
   +community: ?string,
-  +members: $ReadOnlyArray<MemberInfo>,
+  +members: $ReadOnlyArray<LegacyMemberInfo>,
   +roles: { +[id: string]: LegacyRoleInfo },
   +currentUser: ThreadCurrentUserInfo,
   +sourceMessageID?: string,
@@ -126,7 +127,7 @@
     parentThreadID: t.maybe(tID),
     containingThreadID: t.maybe(tID),
     community: t.maybe(tID),
-    members: t.list(memberInfoValidator),
+    members: t.list(legacyMemberInfoValidator),
     roles: t.dict(tID, legacyRoleInfoValidator),
     currentUser: threadCurrentUserInfoValidator,
     sourceMessageID: t.maybe(tID),
diff --git a/native/redux/edit-thread-permission-migration.js b/native/redux/edit-thread-permission-migration.js
--- a/native/redux/edit-thread-permission-migration.js
+++ b/native/redux/edit-thread-permission-migration.js
@@ -2,7 +2,7 @@
 
 import { threadTypes } from 'lib/types/thread-types-enum.js';
 import type {
-  MemberInfo,
+  LegacyMemberInfo,
   ThreadCurrentUserInfo,
   RawThreadInfo,
   LegacyRoleInfo,
@@ -10,7 +10,7 @@
 } from 'lib/types/thread-types.js';
 
 function addDetailedThreadEditPermissionsToUser<
-  T: MemberInfo | ThreadCurrentUserInfo,
+  T: LegacyMemberInfo | ThreadCurrentUserInfo,
 >(threadInfo: RawThreadInfo, member: T, threadID: string): T {
   let newPermissions = null;
   if (threadInfo.type === threadTypes.PRIVATE) {
diff --git a/native/redux/manage-pins-permission-migration.js b/native/redux/manage-pins-permission-migration.js
--- a/native/redux/manage-pins-permission-migration.js
+++ b/native/redux/manage-pins-permission-migration.js
@@ -2,7 +2,7 @@
 
 import type {
   RawThreadInfo,
-  MemberInfo,
+  LegacyMemberInfo,
   ThreadCurrentUserInfo,
   LegacyRoleInfo,
   RawThreadInfos,
@@ -13,7 +13,7 @@
 const adminRoleName = 'Admins';
 
 function addManagePinsThreadPermissionToUser<
-  TargetMemberInfo: MemberInfo | ThreadCurrentUserInfo,
+  TargetMemberInfo: LegacyMemberInfo | ThreadCurrentUserInfo,
 >(
   threadInfo: RawThreadInfo,
   member: TargetMemberInfo,
diff --git a/native/redux/update-roles-and-permissions.js b/native/redux/update-roles-and-permissions.js
--- a/native/redux/update-roles-and-permissions.js
+++ b/native/redux/update-roles-and-permissions.js
@@ -10,7 +10,7 @@
 import type {
   RawThreadInfo,
   ThreadStoreThreadInfos,
-  MemberInfo,
+  LegacyMemberInfo,
 } from 'lib/types/thread-types.js';
 import { values } from 'lib/utils/objects.js';
 
@@ -84,7 +84,7 @@
     const memberToThreadPermissionsForChildren: {
       [string]: ?ThreadPermissionsBlob,
     } = {};
-    for (const member: MemberInfo of threadInfo.members) {
+    for (const member: LegacyMemberInfo of threadInfo.members) {
       const { id, role } = member;
 
       const rolePermissions = role ? threadInfo.roles[role].permissions : null;