This is a work-around to create a new family for already registered individuals. This involves creating a new registration under Family registration.  Then moving all of the individuals under the family name, then deleting the "fake" registration.

Create new registration:
  1. Go to the front end of your event site 
  2. Click Participant Registration
  3. Click "I Agree" on the Waiver, if your organization has one set up
  4. Click Register Family 
Follow the steps to register a "fake" individual to start this family.  After this is complete, you will go back into Sphere to start the process of moving the individuals.

Move Individuals to Family:

  1. Navigate to Communities > Special Events > Friends Asking Friends > Kintera Thon > Thon Name > Event Admin
  2. Click Manage Families and Family Members
    ** You should now see the newly created family with the fake registrant
  3. Expand Individuals
  4. Search for a member of the family and click their last name
  5. Click Move Participant
  6. Choose the name of the family and click save
  7. Repeat with all family members

Delete Fake Registration:

  1. Go to Communities > Special Events > Friends Asking Friends > Kintera Thon > Thon Name > Bookkeeping
  2. Click Manage Initiative Records
  3. Search for fake participant
  4. Click Edit by their name
  5. Click Delete record from initiative
  6. Give a reason and description
  7. Click delete

This is not like a team registration, where if you delete the team captain, the whole team will be deleted. While our fake registrant is family leader by default (because he was the first registered when the family was created) it will not delete the other family members. They will remain as part of the family.
 
Also, please note, if we go back to Communities > Special Events > Friends Asking Friends > Kintera Thon > Thon name > Event Admin > Manage Families and Family Members, we see that the fake registration remains.
 
This is the only place that you will see that registration. The real family will not see that fake name anywhere on their family page. It won't come up in your participants reports or be seen in manage initiative records.