If you have multiple homes that you want unique Alexa accounts for, most email services allow you to create aliased emails.
- Visit https://alexa.amazon.com
- Select "CREATE A NEW AMAZON ACCOUNT"
- For the email portion you can use your email address with any suffix appended after a "+".
Original email address: firstname.lastname@example.org
- The account should send mail to your original email account but act as a distinct account within Amazon's system.