diff --git a/README.md b/README.md
index c744cf2a..364aef7a 100644
--- a/README.md
+++ b/README.md
@@ -196,14 +196,14 @@ function MyApp({ Component, pageProps }: AppProps) {
 
 ## Utilities
 
-### atomWithInitialValue
+### initializableAtom
 
 `atom`, but initial value can be specified when using it.
 
 Note: This is just a utility and does not depend on either Recoil Sync or Next.js.
 
 ```typescript
-function atomWithInitialValue<T extends SerializableParam>(options: {
+function initializableAtom<T extends SerializableParam>(options: {
   key: string
   effects?:
     | ReadonlyArray<AtomEffect<T>>
@@ -229,9 +229,9 @@ A function which takes its `initialValue`.
 #### Example
 
 ```tsx
-import { atomWithInitialValue } from 'recoil-sync-next'
+import { initializableAtom } from 'recoil-sync-next'
 
-const countState = atomWithInitialValue<number>({
+const countState = initializableAtom<number>({
   key: 'count',
 })
 
@@ -241,14 +241,14 @@ const MyComponent: React.FC = () => {
 }
 ```
 
-### atomFamilyWithInitialValue
+### initializableAtomFamily
 
 `atomFamily`, but initial value can be specified individually when using it.
 
 Note: This is just a utility and does not depend on either Recoil Sync or Next.js.
 
 ```typescript
-function atomFamilyWithInitialValue<
+function initializableAtomFamily<
   T extends SerializableParam,
   P extends SerializableParam
 >(options: {
@@ -280,9 +280,9 @@ A function which takes `paramter` that map to an atom, and its `initialValue`.
 #### Example
 
 ```tsx
-import { atomFamilyWithInitialValue } from 'recoil-sync-next'
+import { initializableAtomFamily } from 'recoil-sync-next'
 
-const countState = atomFamilyWithInitialValue<number, string>({
+const countState = initializableAtomFamily<number, string>({
   key: 'count',
 })
 
diff --git a/src/history/RecoilHistorySyncJSONNext.test.tsx b/src/history/RecoilHistorySyncJSONNext.test.tsx
index 108a406f..09d386c8 100644
--- a/src/history/RecoilHistorySyncJSONNext.test.tsx
+++ b/src/history/RecoilHistorySyncJSONNext.test.tsx
@@ -12,7 +12,7 @@ import { act } from 'react-dom/test-utils'
 import { atom, atomFamily, RecoilRoot, useRecoilState } from 'recoil'
 import { syncEffect } from 'recoil-sync'
 
-import { atomFamilyWithInitialValue } from '../utils/atomFamilyWithInitialValue'
+import { initializableAtomFamily } from '../utils/initializableAtomFamily'
 
 import { RecoilHistorySyncJSONNext } from './RecoilHistorySyncJSONNext'
 
@@ -235,8 +235,8 @@ describe('<RecoilHistorySyncJSONNext />', () => {
     })
   })
 
-  describe('use atomFamilyWithInitialValue()', () => {
-    const testStringState = atomFamilyWithInitialValue<string, string>({
+  describe('use initializableAtomFamily()', () => {
+    const testStringState = initializableAtomFamily<string, string>({
       key: nextKey(),
       effects: [syncEffect({ refine: string() })],
     })
diff --git a/src/index.ts b/src/index.ts
index 7e40a793..7d127d2b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,5 +2,5 @@ export * from './history/RecoilHistorySyncJSONNext'
 export * from './history/RecoilHistorySyncTransitNext'
 export * from './url/RecoilURLSyncJSONNext'
 export * from './url/RecoilURLSyncTransitNext'
-export * from './utils/atomFamilyWithInitialValue'
-export * from './utils/atomWithInitialValue'
+export * from './utils/initializableAtom'
+export * from './utils/initializableAtomFamily'
diff --git a/src/utils/atomWithInitialValue.test.tsx b/src/utils/initializableAtom.test.tsx
similarity index 86%
rename from src/utils/atomWithInitialValue.test.tsx
rename to src/utils/initializableAtom.test.tsx
index 0b21e60b..5974a43e 100644
--- a/src/utils/atomWithInitialValue.test.tsx
+++ b/src/utils/initializableAtom.test.tsx
@@ -4,16 +4,16 @@ import React, { ReactNode } from 'react'
 import { act } from 'react-dom/test-utils'
 import { RecoilRoot, useRecoilState, useRecoilValue } from 'recoil'
 
-import { atomWithInitialValue } from './atomWithInitialValue'
+import { initializableAtom } from './initializableAtom'
 
 let atomIndex = 0
-const nextKey = () => `atomWithInitialValue/test/${atomIndex++}`
+const nextKey = () => `initializableAtom/test/${atomIndex++}`
 
-const testStringState = atomWithInitialValue<string>({
+const testStringState = initializableAtom<string>({
   key: nextKey(),
 })
 
-const testNumberState = atomWithInitialValue<number>({
+const testNumberState = initializableAtom<number>({
   key: nextKey(),
 })
 
@@ -21,7 +21,7 @@ const App: React.FC<{ children: ReactNode }> = ({ children }) => (
   <RecoilRoot>{children}</RecoilRoot>
 )
 
-describe('atomWithInitialValue', () => {
+describe('initializableAtom', () => {
   describe('just hook', () => {
     describe('single state', () => {
       it('should be initialized with a specific value', async () => {
diff --git a/src/utils/atomWithInitialValue.ts b/src/utils/initializableAtom.ts
similarity index 90%
rename from src/utils/atomWithInitialValue.ts
rename to src/utils/initializableAtom.ts
index c72a3bfa..f782a591 100644
--- a/src/utils/atomWithInitialValue.ts
+++ b/src/utils/initializableAtom.ts
@@ -6,7 +6,7 @@ import {
   AtomOptions,
 } from 'recoil'
 
-export function atomWithInitialValue<T extends SerializableParam>(
+export function initializableAtom<T extends SerializableParam>(
   options: Omit<AtomOptions<T>, 'default'>
 ): (initialValue: T) => RecoilState<T> {
   const baseAtom: RecoilState<T> = atom<T>({
diff --git a/src/utils/atomFamilyWithInitialValue.test.tsx b/src/utils/initializableAtomFamily.test.tsx
similarity index 93%
rename from src/utils/atomFamilyWithInitialValue.test.tsx
rename to src/utils/initializableAtomFamily.test.tsx
index 5281f9a5..3715f7a5 100644
--- a/src/utils/atomFamilyWithInitialValue.test.tsx
+++ b/src/utils/initializableAtomFamily.test.tsx
@@ -4,16 +4,16 @@ import { ReactNode } from 'react'
 import { act } from 'react-dom/test-utils'
 import { RecoilRoot, useRecoilState, useRecoilValue } from 'recoil'
 
-import { atomFamilyWithInitialValue } from './atomFamilyWithInitialValue'
+import { initializableAtomFamily } from './initializableAtomFamily'
 
 let atomIndex = 0
-const nextKey = () => `atomFamilyWithInitialValue/test/${atomIndex++}`
+const nextKey = () => `initializableAtomFamily/test/${atomIndex++}`
 
-const testStringState = atomFamilyWithInitialValue<string, string>({
+const testStringState = initializableAtomFamily<string, string>({
   key: nextKey(),
 })
 
-const testNumberState = atomFamilyWithInitialValue<number, string>({
+const testNumberState = initializableAtomFamily<number, string>({
   key: nextKey(),
 })
 
@@ -21,7 +21,7 @@ const App: React.FC<{ children: ReactNode }> = ({ children }) => (
   <RecoilRoot>{children}</RecoilRoot>
 )
 
-describe('atomFamilyWithInitialValue', () => {
+describe('initializableAtomFamily', () => {
   describe('just hook', () => {
     describe('single state', () => {
       it('should be initialized with a specific value', async () => {
diff --git a/src/utils/atomFamilyWithInitialValue.ts b/src/utils/initializableAtomFamily.ts
similarity index 94%
rename from src/utils/atomFamilyWithInitialValue.ts
rename to src/utils/initializableAtomFamily.ts
index d14d5ad9..ef9eb3ee 100644
--- a/src/utils/atomFamilyWithInitialValue.ts
+++ b/src/utils/initializableAtomFamily.ts
@@ -6,7 +6,7 @@ import {
   AtomFamilyOptions,
 } from 'recoil'
 
-export function atomFamilyWithInitialValue<
+export function initializableAtomFamily<
   T extends SerializableParam,
   P extends SerializableParam
 >(