diff --git a/app/(application)/edit-profile.tsx b/app/(application)/edit-profile.tsx
index 9192726..b746b57 100644
--- a/app/(application)/edit-profile.tsx
+++ b/app/(application)/edit-profile.tsx
@@ -8,6 +8,7 @@ import { ConstEnv } from "@/constants/ConstEnv";
 import Styles from "@/constants/Styles";
 import { apiEditProfile, apiGetProfile } from "@/lib/api";
 import { setEntities } from "@/lib/entitiesSlice";
+import { validateName } from "@/lib/fun_validateName";
 import { useAuthSession } from "@/providers/AuthProvider";
 import { MaterialCommunityIcons } from "@expo/vector-icons";
 import { useHeaderHeight } from "@react-navigation/elements";
@@ -109,7 +110,7 @@ export default function EditProfile() {
          }
       } else if (cat == "name") {
          setData({ ...data, name: val });
-         if (val == "") {
+         if (!validateName(val)) {
             setError({ ...error, name: true });
          } else {
             setError({ ...error, name: false });
@@ -305,7 +306,7 @@ export default function EditProfile() {
                      required
                      value={data?.name}
                      error={error.name}
-                     errorText="Nama tidak boleh kosong"
+                     errorText="Nama harus 3–50 karakter (huruf, angka, spasi, dan simbol ringan (. , ' _ -))"
                      onChange={val => {
                         validationForm("name", val)
                      }}
diff --git a/app/(application)/member/create.tsx b/app/(application)/member/create.tsx
index 79baf0a..e7325e2 100644
--- a/app/(application)/member/create.tsx
+++ b/app/(application)/member/create.tsx
@@ -7,6 +7,7 @@ import Text from "@/components/Text";
 import { ColorsStatus } from "@/constants/ColorsStatus";
 import Styles from "@/constants/Styles";
 import { apiCreateUser } from "@/lib/api";
+import { validateName } from "@/lib/fun_validateName";
 import { setUpdateMember } from "@/lib/memberSlice";
 import { useAuthSession } from "@/providers/AuthProvider";
 import { MaterialCommunityIcons } from "@expo/vector-icons";
@@ -100,7 +101,7 @@ export default function CreateMember() {
          }
       } else if (cat == "name") {
          setDataForm({ ...dataForm, name: val });
-         if (val == "") {
+         if (!validateName(val)) {
             setError({ ...error, name: true });
          } else {
             setError({ ...error, name: false });
@@ -309,7 +310,7 @@ export default function CreateMember() {
                      placeholder="Nama"
                      required
                      error={error.name}
-                     errorText="Nama tidak boleh kosong"
+                     errorText="Nama harus 3–50 karakter (huruf, angka, spasi, dan simbol ringan (. , ' _ -))"
                      onChange={val => {
                         validationForm("name", val)
                      }}
diff --git a/app/(application)/member/edit/[id].tsx b/app/(application)/member/edit/[id].tsx
index f4ba6fb..3f6021d 100644
--- a/app/(application)/member/edit/[id].tsx
+++ b/app/(application)/member/edit/[id].tsx
@@ -7,6 +7,7 @@ import Text from "@/components/Text";
 import { ConstEnv } from "@/constants/ConstEnv";
 import Styles from "@/constants/Styles";
 import { apiEditUser, apiGetProfile } from "@/lib/api";
+import { validateName } from "@/lib/fun_validateName";
 import { setUpdateMember } from "@/lib/memberSlice";
 import { useAuthSession } from "@/providers/AuthProvider";
 import { MaterialCommunityIcons } from "@expo/vector-icons";
@@ -132,7 +133,7 @@ export default function EditMember() {
          }
       } else if (cat == "name") {
          setData({ ...data, name: val });
-         if (val == "") {
+         if (!validateName(val)) {
             setError({ ...error, name: true });
          } else {
             setError({ ...error, name: false });
@@ -348,7 +349,7 @@ export default function EditMember() {
                      required
                      value={data?.name}
                      error={error.name}
-                     errorText="Nama tidak boleh kosong"
+                     errorText="Nama harus 3–50 karakter (huruf, angka, spasi, dan simbol ringan (. , ' _ -))"
                      onChange={val => {
                         validationForm("name", val)
                      }}
diff --git a/lib/fun_validateName.ts b/lib/fun_validateName.ts
new file mode 100644
index 0000000..bddcf54
--- /dev/null
+++ b/lib/fun_validateName.ts
@@ -0,0 +1,18 @@
+/**
+ * Validasi Display Name
+ * Aturan:
+ * - 2 sampai 50 karakter
+ * - Huruf, angka, spasi, titik, koma, apostrof, underscore, dan dash
+ * - Tidak boleh semua spasi
+ */
+export const validateName = (name: string): boolean => {
+   const trimmed = name.trim();
+
+   // Jika kosong setelah di-trim → invalid
+   if (!trimmed) return false;
+
+   // Regex: hanya huruf, angka, spasi, titik, koma, apostrof, underscore, dash
+   const regex = /^[a-zA-Z0-9\s._,'-]{3,50}$/;
+
+   return regex.test(trimmed);
+};
\ No newline at end of file