diff --git a/crates/ely_browser_core/src/state/sync_profiles.rs b/crates/ely_browser_core/src/state/sync_profiles.rs
index a7973b6..3c4ace1 100644
--- a/crates/ely_browser_core/src/state/sync_profiles.rs
+++ b/crates/ely_browser_core/src/state/sync_profiles.rs
@@ -24,18 +24,28 @@ impl BrowserCore {
             summary.record_skipped();
             return Ok(());
         }
+        let name = record.name.trim().to_string();
 
-        let existing_index =
-            self.profiles.iter().position(|profile| profile.id() == &profile_id).or_else(|| {
-                self.profiles
-                    .iter()
-                    .position(|profile| profile.name().eq_ignore_ascii_case(record.name.trim()))
+        let existing_index = self
+            .profiles
+            .iter()
+            .position(|profile| profile.id() == &profile_id && profile.kind() == &kind)
+            .or_else(|| {
+                self.profiles.iter().position(|profile| {
+                    profile.kind() == &kind && profile.name().eq_ignore_ascii_case(&name)
+                })
             });
         let id = existing_index
             .and_then(|index| self.profiles.get(index).map(|profile| profile.id().clone()))
-            .unwrap_or_else(|| profile_id.clone());
+            .unwrap_or_else(|| {
+                if self.profiles.iter().any(|profile| profile.id() == &profile_id) {
+                    ProfileId::new()
+                } else {
+                    profile_id.clone()
+                }
+            });
         context.register_profile_alias(profile_id, id.clone());
-        let mut profile = Profile::new(record.name, record.color_hex, kind);
+        let mut profile = Profile::new(name, record.color_hex, kind);
         profile.set_sync_policy(record.sync_policy.into());
         let profile = Profile::restore(id, profile);
 
diff --git a/crates/ely_browser_core/tests/sync_profiles.rs b/crates/ely_browser_core/tests/sync_profiles.rs
index 14f86bd..591e328 100644
--- a/crates/ely_browser_core/tests/sync_profiles.rs
+++ b/crates/ely_browser_core/tests/sync_profiles.rs
@@ -112,3 +112,68 @@ fn paused_profile_data_is_omitted_from_sync_snapshots() -> Result<(), Box<dyn Er
     assert!(target.snapshot()?.history_entries.is_empty());
     Ok(())
 }
+
+#[test]
+fn standard_profile_sync_preserves_a_same_named_private_profile() -> Result<(), Box<dyn Error>> {
+    let mut source_config = InitialBrowserConfig::ely_defaults()?;
+    source_config.profile_name = "Private".to_string();
+    let mut source = BrowserCore::new(source_config)?;
+    source.navigate_active_tab(UrlText::parse("https://example.com/remote")?)?;
+    let bytes = source.build_sync_snapshot_bytes()?;
+
+    let mut target = BrowserCore::new(InitialBrowserConfig::private_window()?)?;
+    let private_profile_id = target.snapshot()?.active_profile_id;
+    target.navigate_active_tab(UrlText::parse("https://private.example/secret")?)?;
+    target.apply_sync_snapshot_bytes(&bytes)?;
+    let snapshot = target.snapshot()?;
+
+    assert!(snapshot.profiles.iter().any(|profile| {
+        profile.id() == &private_profile_id && profile.kind() == &ProfileKind::Private
+    }));
+    assert!(snapshot.profiles.iter().any(|profile| {
+        profile.id() != &private_profile_id
+            && profile.name() == "Private"
+            && profile.kind() == &ProfileKind::Standard
+    }));
+    let outbound = String::from_utf8(target.build_sync_snapshot_bytes()?)?;
+    assert!(!outbound.contains("https://private.example/secret"));
+    assert!(outbound.contains("https://example.com/remote"));
+    Ok(())
+}
+
+#[test]
+fn standard_profile_sync_remaps_a_private_profile_id_collision() -> Result<(), Box<dyn Error>> {
+    let mut target = BrowserCore::new(InitialBrowserConfig::private_window()?)?;
+    let private_profile_id = target.snapshot()?.active_profile_id;
+    target.navigate_active_tab(UrlText::parse("https://private.example/id-secret")?)?;
+
+    let mut source_config = InitialBrowserConfig::ely_defaults()?;
+    source_config.profile_id = Some(private_profile_id.clone());
+    source_config.profile_name = " Synced ".to_string();
+    let mut source = BrowserCore::new(source_config)?;
+    source.navigate_active_tab(UrlText::parse("https://example.com/id-remote")?)?;
+    let bytes = source.build_sync_snapshot_bytes()?;
+    target.apply_sync_snapshot_bytes(&bytes)?;
+    target.apply_sync_snapshot_bytes(&bytes)?;
+    let snapshot = target.snapshot()?;
+
+    assert!(snapshot.profiles.iter().any(|profile| {
+        profile.id() == &private_profile_id && profile.kind() == &ProfileKind::Private
+    }));
+    assert_eq!(
+        snapshot
+            .profiles
+            .iter()
+            .filter(|profile| {
+                profile.id() != &private_profile_id
+                    && profile.name() == "Synced"
+                    && profile.kind() == &ProfileKind::Standard
+            })
+            .count(),
+        1
+    );
+    let outbound = String::from_utf8(target.build_sync_snapshot_bytes()?)?;
+    assert!(!outbound.contains("https://private.example/id-secret"));
+    assert!(outbound.contains("https://example.com/id-remote"));
+    Ok(())
+}