diff --git a/frontend/src/views/CalendarView.vue b/frontend/src/views/CalendarView.vue
index 0590e43..6c62dbd 100644
--- a/frontend/src/views/CalendarView.vue
+++ b/frontend/src/views/CalendarView.vue
@@ -256,7 +256,22 @@
     <!-- Calendar Menu -->
     <Dialog v-model:visible="showCalMenu" header="Kalender-Optionen" modal :style="{ width: '480px' }">
       <div v-if="selectedCal" class="cal-menu-content">
-        <p><strong>{{ selectedCal.name }}</strong></p>
+        <div class="rename-row">
+          <template v-if="!isRenamingCal">
+            <strong>{{ selectedCal.name }}</strong>
+            <Button v-if="selectedCal.permission === 'owner'"
+                    icon="pi pi-pencil" text size="small" title="Umbenennen"
+                    @click="startRenameCal" />
+          </template>
+          <template v-else>
+            <InputText v-model="renameCalValue" fluid autofocus
+                       @keyup.enter="saveRenameCal" @keyup.escape="isRenamingCal = false" />
+            <Button icon="pi pi-check" text size="small" severity="success"
+                    title="Speichern" @click="saveRenameCal" />
+            <Button icon="pi pi-times" text size="small"
+                    title="Abbrechen" @click="isRenamingCal = false" />
+          </template>
+        </div>
 
         <div class="field">
           <label>
@@ -1070,10 +1085,38 @@ function openCalendarMenu(cal) {
   icalPassword.value = ''
   shareUsername.value = ''
   shareSearchResults.value = []
+  isRenamingCal.value = false
   showCalMenu.value = true
   loadShares()
 }
 
+const isRenamingCal = ref(false)
+const renameCalValue = ref('')
+
+function startRenameCal() {
+  renameCalValue.value = selectedCal.value?.name || ''
+  isRenamingCal.value = true
+}
+
+async function saveRenameCal() {
+  const newName = renameCalValue.value.trim()
+  if (!newName || !selectedCal.value || newName === selectedCal.value.name) {
+    isRenamingCal.value = false
+    return
+  }
+  try {
+    await apiClient.put(`/calendars/${selectedCal.value.id}`, { name: newName })
+    selectedCal.value.name = newName
+    isRenamingCal.value = false
+    await loadCalendars()
+    refreshEvents()
+    toast.add({ severity: 'success', summary: 'Umbenannt', life: 2000 })
+  } catch (err) {
+    toast.add({ severity: 'error', summary: 'Fehler',
+                detail: err.response?.data?.error || err.message, life: 4000 })
+  }
+}
+
 function onShareSearch() {
   clearTimeout(shareSearchTimer)
   const q = shareUsername.value.trim()
@@ -1307,6 +1350,8 @@ onUnmounted(() => {
 .user-result { padding: 0.5rem 0.75rem; cursor: pointer; font-size: 0.875rem; display: flex; gap: 0.5rem; align-items: center; }
 .user-result:hover { background: var(--p-primary-50); }
 .user-fullname { color: var(--p-text-muted-color); font-size: 0.75rem; margin-left: auto; }
+.rename-row { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.75rem; }
+.rename-row strong { font-size: 1rem; }
 .existing-shares { margin-top: 0.5rem; }
 .share-perm-item { display: flex; align-items: center; gap: 0.5rem; padding: 0.375rem 0; font-size: 0.875rem; flex-wrap: wrap; }
 .share-perm-item.editing { background: var(--p-surface-50); padding: 0.5rem; border-radius: 4px; }
diff --git a/frontend/src/views/ContactsView.vue b/frontend/src/views/ContactsView.vue
index f8b509f..694e085 100644
--- a/frontend/src/views/ContactsView.vue
+++ b/frontend/src/views/ContactsView.vue
@@ -92,7 +92,22 @@
     <!-- Book Menu (3-dot) -->
     <Dialog v-model:visible="showBookMenu" header="Adressbuch-Optionen" modal :style="{ width: '560px' }">
       <div v-if="menuBook" class="book-menu-content">
-        <p><strong>{{ menuBook.name }}</strong></p>
+        <div class="rename-row">
+          <template v-if="!isRenamingBook">
+            <strong>{{ menuBook.name }}</strong>
+            <Button v-if="menuBook.permission === 'owner'"
+                    icon="pi pi-pencil" text size="small" title="Umbenennen"
+                    @click="startRenameBook" />
+          </template>
+          <template v-else>
+            <InputText v-model="renameBookValue" fluid autofocus
+                       @keyup.enter="saveRenameBook" @keyup.escape="isRenamingBook = false" />
+            <Button icon="pi pi-check" text size="small" severity="success"
+                    title="Speichern" @click="saveRenameBook" />
+            <Button icon="pi pi-times" text size="small"
+                    title="Abbrechen" @click="isRenamingBook = false" />
+          </template>
+        </div>
 
         <div class="field">
           <label>
@@ -529,10 +544,37 @@ function openBookMenu(book) {
   shareUsername.value = ''
   shareSearchResults.value = []
   editingShareId.value = null
+  isRenamingBook.value = false
   showBookMenu.value = true
   loadShares()
 }
 
+const isRenamingBook = ref(false)
+const renameBookValue = ref('')
+
+function startRenameBook() {
+  renameBookValue.value = menuBook.value?.name || ''
+  isRenamingBook.value = true
+}
+
+async function saveRenameBook() {
+  const newName = renameBookValue.value.trim()
+  if (!newName || !menuBook.value || newName === menuBook.value.name) {
+    isRenamingBook.value = false
+    return
+  }
+  try {
+    await apiClient.put(`/addressbooks/${menuBook.value.id}`, { name: newName })
+    menuBook.value.name = newName
+    isRenamingBook.value = false
+    await loadBooks()
+    toast.add({ severity: 'success', summary: 'Umbenannt', life: 2000 })
+  } catch (err) {
+    toast.add({ severity: 'error', summary: 'Fehler',
+                detail: err.response?.data?.error || err.message, life: 4000 })
+  }
+}
+
 async function loadShares() {
   if (!menuBook.value || menuBook.value.permission !== 'owner') {
     bookShares.value = []
@@ -896,6 +938,8 @@ watch(selectedBookId, loadContacts)
 .multi-row { display: flex; gap: 0.5rem; align-items: center; margin-bottom: 0.4rem; }
 .address-card { border: 1px solid var(--p-surface-200); padding: 0.75rem; border-radius: 6px; margin-bottom: 0.75rem; }
 .share-row { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
+.rename-row { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.75rem; }
+.rename-row strong { font-size: 1rem; }
 .user-search-popup { position: absolute; top: 100%; left: 0; right: 0; z-index: 10;
                      background: white; border: 1px solid var(--p-surface-200);
                      border-radius: 4px; max-height: 160px; overflow-y: auto;
diff --git a/frontend/src/views/TasksView.vue b/frontend/src/views/TasksView.vue
index bf04431..e87e609 100644
--- a/frontend/src/views/TasksView.vue
+++ b/frontend/src/views/TasksView.vue
@@ -108,7 +108,22 @@
     <!-- List Menu -->
     <Dialog v-model:visible="showListMenu" header="Listen-Optionen" modal :style="{ width: '480px' }">
       <div v-if="menuList">
-        <p><strong>{{ menuList.name }}</strong></p>
+        <div class="rename-row">
+          <template v-if="!isRenaming">
+            <strong>{{ menuList.name }}</strong>
+            <Button v-if="menuList.permission === 'owner'"
+                    icon="pi pi-pencil" text size="small" title="Umbenennen"
+                    @click="startRename" />
+          </template>
+          <template v-else>
+            <InputText v-model="renameValue" fluid autofocus
+                       @keyup.enter="saveRename" @keyup.escape="isRenaming = false" />
+            <Button icon="pi pi-check" text size="small" severity="success"
+                    title="Speichern" @click="saveRename" />
+            <Button icon="pi pi-times" text size="small"
+                    title="Abbrechen" @click="isRenaming = false" />
+          </template>
+        </div>
         <div class="field">
           <label>Farbe</label>
           <InputText :modelValue="menuList.color" @change="onListColor($event)" type="color" style="width:60px; height:36px" />
@@ -273,6 +288,31 @@ const listShares = ref([])
 const shareSearchResults = ref([])
 const editingShareId = ref(null)
 const editSharePermission = ref('read')
+const isRenaming = ref(false)
+const renameValue = ref('')
+
+function startRename() {
+  renameValue.value = menuList.value?.name || ''
+  isRenaming.value = true
+}
+
+async function saveRename() {
+  const newName = renameValue.value.trim()
+  if (!newName || !menuList.value || newName === menuList.value.name) {
+    isRenaming.value = false
+    return
+  }
+  try {
+    await apiClient.put(`/tasklists/${menuList.value.id}`, { name: newName })
+    menuList.value.name = newName
+    isRenaming.value = false
+    await loadLists()
+    toast.add({ severity: 'success', summary: 'Umbenannt', life: 2000 })
+  } catch (err) {
+    toast.add({ severity: 'error', summary: 'Fehler',
+                detail: err.response?.data?.error || err.message, life: 4000 })
+  }
+}
 let shareSearchTimer = null
 
 function startEditShare(s) {
@@ -423,6 +463,7 @@ function openListMenu(tl) {
   menuList.value = tl
   shareUsername.value = ''
   shareSearchResults.value = []
+  isRenaming.value = false
   showListMenu.value = true
   loadShares()
 }
@@ -705,6 +746,8 @@ watch(selectedListId, loadTasks)
 .field-row { display: flex; gap: 0.75rem; }
 .field-row .field { flex: 1; }
 .share-row { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
+.rename-row { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.75rem; }
+.rename-row strong { font-size: 1rem; }
 .user-search-popup { position: absolute; top: 100%; left: 0; right: 0; z-index: 10;
                      background: white; border: 1px solid var(--p-surface-200);
                      border-radius: 4px; max-height: 160px; overflow-y: auto;