Open your Android phone's settings. Scroll to Passwords and accounts. Select a Google account you want to remove. Tap Remove account.
That means you are each using a browser signed into the same Google account so all the synced data shows up on all computers/devices signed into that account.
Select Start > Settings > Accounts > Other users. Select the person's name or email address, then select Remove.
LockWiper (Android) enables you to remove Google account without password easily: Bypass Google account verification on android without any prior knowledge of the accounts and passwords. Remove your synced account from the previous one and avoid tracing and blocking.
See the IP Address Signed in to Gmail
A Gmail account has the feature to see the IP address that has access to your account. For this, you have to go on Gmail on the web and then select the Details link at the bottom of the right corner. This page would show the multiple locations, you are signed in to your account.
You can see computers, phones, and other devices where you are or were signed in to your Google Account recently. You can check google.com/devices to make sure no one else has signed in to your account.
In case if the Google search history of your android device is showing in other devices then may be you are using the same Google account in both devices.
Things to consider before deleting your Google account
You lose access to data saved on Google services like Google Drive, Gmail, YouTube, Google Contacts, and Google Photos. You lose your online history, including your Google Maps travel history, Google Search history, and YouTube watch history.
Here is how to remove a Google account from Chrome:
Select the user profile that you want to remove and click on the options icon from the top-right of the user profile. Now remove the Gmail account from chrome, click on “Remove This Person”. You will get a confirmation message, click again on “Remove This Person“.
Using Gmail app
In the Settings, tap the 3 dots on the upper right corner, and select Manage Accounts. Select the account which you want to remove, and Tap remove account. And that's it.
Open the Gmail app or go to the Gmail website. Tap or click on the account icon in the top right corner. Select "Manage accounts on this device" or "Manage your Google Account." Choose the account you want to remove and select "Remove Account."
A Samsung account allows you to use and sync Samsung services across Samsung devices, e.g. Galaxy smartphones and tablets. A Google account lets you access Google products on devices across different platforms e.g. Android and iOS.
Step 2: On the right-hand menu, select Security. Step 3: On the Your device section, tap the Manage devices option. A list of devices connected to your Google account will be displayed on the new page. Step 4: Tap the three-dotted menu icon at the top-right corner of the device you want to remove from your account.
Yes, factory reset removes the Google Account from Android device, But on device setup after factory reset, it'll ask for Google account which was logged in before factory reset. This is called FRP(Factory reset protection).