diff --git a/geneit_app/src/api/MemberApi.ts b/geneit_app/src/api/MemberApi.ts
index 3959cf6..b9a873f 100644
--- a/geneit_app/src/api/MemberApi.ts
+++ b/geneit_app/src/api/MemberApi.ts
@@ -195,6 +195,16 @@ export class MembersList {
   children(id: number): Member[] {
     return this.list.filter((m) => m.mother === id || m.father === id);
   }
+
+  siblings(id: number): Member[] {
+    const p = this.get(id);
+    return this.list.filter(
+      (m) =>
+        m.id !== p?.id &&
+        ((m.mother && m.mother === p?.mother) ||
+          (m.father && m.father === p?.father))
+    );
+  }
 }
 
 export class MemberApi {
diff --git a/geneit_app/src/routes/family/FamilyMemberRoute.tsx b/geneit_app/src/routes/family/FamilyMemberRoute.tsx
index a951eec..e5d792d 100644
--- a/geneit_app/src/routes/family/FamilyMemberRoute.tsx
+++ b/geneit_app/src/routes/family/FamilyMemberRoute.tsx
@@ -128,6 +128,7 @@ export function FamilyMemberRoute(): React.ReactElement {
         <MemberPage
           member={member!}
           children={family.members.children(member!.id)}
+          siblings={family.members.siblings(member!.id)}
           creating={false}
           editing={false}
           onRequestDelete={deleteMember}
@@ -206,6 +207,7 @@ export function MemberPage(p: {
   creating: boolean;
   shouldAllowLeaving?: boolean;
   children?: Member[];
+  siblings?: Member[];
   onCancel?: () => void;
   onSave?: (m: Member) => void;
   onRequestEdit?: () => void;
@@ -628,6 +630,26 @@ export function MemberPage(p: {
             </PropertiesBox>
           </Grid>
         )}
+
+        {/* Siblings */}
+        {p.siblings && (
+          <Grid item sm={12} md={6}>
+            <PropertiesBox title="Frères et sœurs">
+              {p.siblings.length === 0 ? (
+                <>Aucun frère ou sœur</>
+              ) : (
+                p.siblings.map((c) => (
+                  <RouterLink
+                    key={c.id}
+                    to={family.family.URL(`member/${c.id}`)}
+                  >
+                    <MemberItem member={c} />
+                  </RouterLink>
+                ))
+              )}
+            </PropertiesBox>
+          </Grid>
+        )}
       </Grid>
     </div>
   );