It is possible to import all of the names from one list to another. The usual time to do this is when creating a new list, and importing last year’s names to it. For example, when creating a Christmas 2019 list, you will probably want to import the names from the Christmas 2018 list.
To achieve this, go to the screen showing the lists. Then, tap the import button on the right-hand side in the same row as the list into which the names are destined. For example, if you want to import the Xmas Work 2019 names into the Thanksgiving 2019 list, tap the button beside the Thanksgiving 2019 list.
Then in the next screen, select the Xmas Work 2019 list, and tap the Import button at the top right.
The Thanksgiving 2019 list will then contain all of the names in the Xmas Work 2019 list, but all names will show as not having a card sent to or received from.