diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35255ab..d35bff0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ SPDX-License-Identifier: MIT
 
 # Changelog for rusty-man
 
+# Unreleased
+
+- Remove suffix from duplicate members (e. g. from Deref implementations).
+
 ## v0.3.0 (2020-09-11)
 
 This minor release adds support for Rust 1.46.0 and significantly improves the
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index d14b45d..25fee96 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -279,8 +279,15 @@ const MODULE_MEMBER_TYPES: &[doc::ItemType] = &[
 ];
 
 fn get_id_part(node: &kuchiki::NodeRef, i: usize) -> Option<String> {
-    node.get_attribute("id")
-        .and_then(|s| s.splitn(2, '.').nth(i).map(ToOwned::to_owned))
+    // id of format <type>.<name> (or <type>.<name>-<idx> for name collisions)
+    if let Some(id) = node.get_attribute("id") {
+        id.splitn(2, '.')
+            .nth(i)
+            .and_then(|s| s.splitn(2, '-').next())
+            .map(ToOwned::to_owned)
+    } else {
+        None
+    }
 }
 
 fn get_fields(
diff --git a/tests/snapshots/output__1.40.0_struct_anyhow_error.snap b/tests/snapshots/output__1.40.0_struct_anyhow_error.snap
index c51a461..7a936ab 100644
--- a/tests/snapshots/output__1.40.0_struct_anyhow_error.snap
+++ b/tests/snapshots/output__1.40.0_struct_anyhow_error.snap
@@ -1,6 +1,6 @@
 ---
 source: tests/output.rs
-expression: "get_stdout(path, &[item])"
+expression: "get_stdout(path, &[\"anyhow::Error\"])"
 ---
 anyhow                                  Struct anyhow::Error                               rusty-man
 
@@ -239,21 +239,21 @@ METHODS
             Downcast this error object by mutable reference.
 
    Methods from Deref<Target = dyn StdError + Send + Sync + 'static>
-      is-1
+      is
             pub fn is<T>(&self) -> bool 
             where
                 T: 'static + Error,
 
             Returns `true` if the boxed type is the same as `T`
 
-      downcast_ref-1
+      downcast_ref
             pub fn downcast_ref<T>(&self) -> Option<&T> 
             where
                 T: 'static + Error,
 
             Returns some reference to the boxed value if it is of type `T`, or `None` if it isn't.
 
-      downcast_mut-1
+      downcast_mut
             pub fn downcast_mut<T>(&mut self) -> Option<&mut T> 
             where
                 T: 'static + Error,
diff --git a/tests/snapshots/output__1.41.1_struct_anyhow_error.snap b/tests/snapshots/output__1.41.1_struct_anyhow_error.snap
index c51a461..7a936ab 100644
--- a/tests/snapshots/output__1.41.1_struct_anyhow_error.snap
+++ b/tests/snapshots/output__1.41.1_struct_anyhow_error.snap
@@ -1,6 +1,6 @@
 ---
 source: tests/output.rs
-expression: "get_stdout(path, &[item])"
+expression: "get_stdout(path, &[\"anyhow::Error\"])"
 ---
 anyhow                                  Struct anyhow::Error                               rusty-man
 
@@ -239,21 +239,21 @@ METHODS
             Downcast this error object by mutable reference.
 
    Methods from Deref<Target = dyn StdError + Send + Sync + 'static>
-      is-1
+      is
             pub fn is<T>(&self) -> bool 
             where
                 T: 'static + Error,
 
             Returns `true` if the boxed type is the same as `T`
 
-      downcast_ref-1
+      downcast_ref
             pub fn downcast_ref<T>(&self) -> Option<&T> 
             where
                 T: 'static + Error,
 
             Returns some reference to the boxed value if it is of type `T`, or `None` if it isn't.
 
-      downcast_mut-1
+      downcast_mut
             pub fn downcast_mut<T>(&mut self) -> Option<&mut T> 
             where
                 T: 'static + Error,
diff --git a/tests/snapshots/output__1.42.0_struct_anyhow_error.snap b/tests/snapshots/output__1.42.0_struct_anyhow_error.snap
index c51a461..7a936ab 100644
--- a/tests/snapshots/output__1.42.0_struct_anyhow_error.snap
+++ b/tests/snapshots/output__1.42.0_struct_anyhow_error.snap
@@ -1,6 +1,6 @@
 ---
 source: tests/output.rs
-expression: "get_stdout(path, &[item])"
+expression: "get_stdout(path, &[\"anyhow::Error\"])"
 ---
 anyhow                                  Struct anyhow::Error                               rusty-man
 
@@ -239,21 +239,21 @@ METHODS
             Downcast this error object by mutable reference.
 
    Methods from Deref<Target = dyn StdError + Send + Sync + 'static>
-      is-1
+      is
             pub fn is<T>(&self) -> bool 
             where
                 T: 'static + Error,
 
             Returns `true` if the boxed type is the same as `T`
 
-      downcast_ref-1
+      downcast_ref
             pub fn downcast_ref<T>(&self) -> Option<&T> 
             where
                 T: 'static + Error,
 
             Returns some reference to the boxed value if it is of type `T`, or `None` if it isn't.
 
-      downcast_mut-1
+      downcast_mut
             pub fn downcast_mut<T>(&mut self) -> Option<&mut T> 
             where
                 T: 'static + Error,
diff --git a/tests/snapshots/output__1.43.1_struct_anyhow_error.snap b/tests/snapshots/output__1.43.1_struct_anyhow_error.snap
index c51a461..7a936ab 100644
--- a/tests/snapshots/output__1.43.1_struct_anyhow_error.snap
+++ b/tests/snapshots/output__1.43.1_struct_anyhow_error.snap
@@ -1,6 +1,6 @@
 ---
 source: tests/output.rs
-expression: "get_stdout(path, &[item])"
+expression: "get_stdout(path, &[\"anyhow::Error\"])"
 ---
 anyhow                                  Struct anyhow::Error                               rusty-man
 
@@ -239,21 +239,21 @@ METHODS
             Downcast this error object by mutable reference.
 
    Methods from Deref<Target = dyn StdError + Send + Sync + 'static>
-      is-1
+      is
             pub fn is<T>(&self) -> bool 
             where
                 T: 'static + Error,
 
             Returns `true` if the boxed type is the same as `T`
 
-      downcast_ref-1
+      downcast_ref
             pub fn downcast_ref<T>(&self) -> Option<&T> 
             where
                 T: 'static + Error,
 
             Returns some reference to the boxed value if it is of type `T`, or `None` if it isn't.
 
-      downcast_mut-1
+      downcast_mut
             pub fn downcast_mut<T>(&mut self) -> Option<&mut T> 
             where
                 T: 'static + Error,
diff --git a/tests/snapshots/output__1.44.1_struct_anyhow_error.snap b/tests/snapshots/output__1.44.1_struct_anyhow_error.snap
index c51a461..7a936ab 100644
--- a/tests/snapshots/output__1.44.1_struct_anyhow_error.snap
+++ b/tests/snapshots/output__1.44.1_struct_anyhow_error.snap
@@ -1,6 +1,6 @@
 ---
 source: tests/output.rs
-expression: "get_stdout(path, &[item])"
+expression: "get_stdout(path, &[\"anyhow::Error\"])"
 ---
 anyhow                                  Struct anyhow::Error                               rusty-man
 
@@ -239,21 +239,21 @@ METHODS
             Downcast this error object by mutable reference.
 
    Methods from Deref<Target = dyn StdError + Send + Sync + 'static>
-      is-1
+      is
             pub fn is<T>(&self) -> bool 
             where
                 T: 'static + Error,
 
             Returns `true` if the boxed type is the same as `T`
 
-      downcast_ref-1
+      downcast_ref
             pub fn downcast_ref<T>(&self) -> Option<&T> 
             where
                 T: 'static + Error,
 
             Returns some reference to the boxed value if it is of type `T`, or `None` if it isn't.
 
-      downcast_mut-1
+      downcast_mut
             pub fn downcast_mut<T>(&mut self) -> Option<&mut T> 
             where
                 T: 'static + Error,
diff --git a/tests/snapshots/output__1.45.2_struct_anyhow_error.snap b/tests/snapshots/output__1.45.2_struct_anyhow_error.snap
index 903f5ed..72dd4b6 100644
--- a/tests/snapshots/output__1.45.2_struct_anyhow_error.snap
+++ b/tests/snapshots/output__1.45.2_struct_anyhow_error.snap
@@ -1,6 +1,6 @@
 ---
 source: tests/output.rs
-expression: "get_stdout(&[item])"
+expression: "get_stdout(path, &[\"anyhow::Error\"])"
 ---
 anyhow                                  Struct anyhow::Error                               rusty-man
 
@@ -239,21 +239,21 @@ METHODS
             Downcast this error object by mutable reference.
 
    Methods from Deref<Target = dyn StdError + Send + Sync + 'static>
-      is-1
+      is
             pub fn is<T>(&self) -> bool 
             where
                 T: 'static + Error,
 
             Returns `true` if the boxed type is the same as `T`
 
-      downcast_ref-1
+      downcast_ref
             pub fn downcast_ref<T>(&self) -> Option<&T> 
             where
                 T: 'static + Error,
 
             Returns some reference to the boxed value if it is of type `T`, or `None` if it isn't.
 
-      downcast_mut-1
+      downcast_mut
             pub fn downcast_mut<T>(&mut self) -> Option<&mut T> 
             where
                 T: 'static + Error,
diff --git a/tests/snapshots/output__1.46.0_struct_anyhow_error.snap b/tests/snapshots/output__1.46.0_struct_anyhow_error.snap
index 40598c8..7a936ab 100644
--- a/tests/snapshots/output__1.46.0_struct_anyhow_error.snap
+++ b/tests/snapshots/output__1.46.0_struct_anyhow_error.snap
@@ -239,21 +239,21 @@ METHODS
             Downcast this error object by mutable reference.
 
    Methods from Deref<Target = dyn StdError + Send + Sync + 'static>
-      is-1
+      is
             pub fn is<T>(&self) -> bool 
             where
                 T: 'static + Error,
 
             Returns `true` if the boxed type is the same as `T`
 
-      downcast_ref-1
+      downcast_ref
             pub fn downcast_ref<T>(&self) -> Option<&T> 
             where
                 T: 'static + Error,
 
             Returns some reference to the boxed value if it is of type `T`, or `None` if it isn't.
 
-      downcast_mut-1
+      downcast_mut
             pub fn downcast_mut<T>(&mut self) -> Option<&mut T> 
             where
                 T: 'static + Error,