Whilst there should be no need to transfer lists between you own devices, as the lists will sync on iCloud, you might want to transfer a list to someone else’s (e.g. spouse) device.

You can do this by exporting a list as a csv file and sharing this file to the other device. Then, on the other device, create a list and import the names from the csv file to that list.

Of course, if the names came originally from Contacts, it is likely that the second device does not have the same names in its Contacts, so the imported names will not be linked to Contacts in the same way as they would be on the first device.