apple Id

(from anotehr device, if possible) See -> If you can't connect or sign in to iCloud

If you can't connect or sign in to iCloud - Apple Support

-> check your 'old' Apple ID via your email box.

If you have you forgotten your password of that 'old Apple ID -> See this Apple article: If you forgot your Apple ID password

If you forgot your Apple ID password - Apple Support

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

👉 Get support -> Contact Apple for help with Apple ID account security

Contact Apple for help with Apple ID account security - Apple Support

See if you can recover the ID/password. An iCloud e-mail address is an Apple ID. Use every email address you can think of.

Apple ID - How to find your Apple  -  

Apple ID - Find  -     

You can also go to iCloud.com or appleid.apple.com and see if your Apple ID prefills on the sign-in screen.   

If you forgot the Apple ID (iCloud) password, enter the Apple (iCloud) ID, and click Forgot Password. See if you can get a Rescue or Notification email option if necessary. Link to contact Apple Support at the end of the 2nd article.

Apple ID - Manage

Apple ID – Forgot Password  *