If your question is can you transfer a Kindle to someone else's account, then that answer is also yes. Go to Amazon, Manage your content and devices, choose which device you want to change, choose “de-register” and remove the first account, then choose “register” and register the new account.
Can you have two accounts on a Kindle?
View of an Amazon's Kindle reader. Amazon is now letting Kindle owners access multiple accounts on a single device. On Friday, Amazon rolled out a software update that includes “Family Library,” a feature that will allow two adults and up to four children to share content on one Kindle.2014-11-14
How do I switch my Kindle to another account?
If your question is can you transfer a Kindle to someone else's account, then that answer is also yes. Go to Amazon, Manage your content and devices, choose which device you want to change, choose “de-register” and remove the first account, then choose “register” and register the new account.