Create and manage families in Rhino®
Select any number of Rhino objects and start typing in the panel a name in the family field. The family is now created in the document and includes the selected geometry. At any time you can assign more objects to an existing family by typing the family name in the Family field of the selected objects. To remove an object from a family just clear the family field of the object.
Create a block in rhino named as the family. The family is now created in the Rhino document and includes the block objects. At any time you can assign more objects to an existing family by adding objects to the block. To remove an object from a family remove it from the block.
Set up a good layer structure to work best with this workflow.