On the desktop version, it's hard to find save places for Google Maps; however, it's saved with Google Bookmarks:
https://www.google.com/bookmarks/lookup?sort=
Creating embedded Google Maps and Using Google Services
You need to have an account that's activated.
How to create the maps:
https://developers.google.com/maps/documentation/embed/guide#api_key
How to activate the API
https://code.google.com/apis/console/?noredirect&pli=1#project:814358246212:services
Rename a saved Google Map
Find you map in https://bookmarks.google.com and then rename it there.