iCloud: Create a group and add contacts in iCloud
When you create a contact using Contacts on iCloud.com, it’s placed in the All Contacts group. To help organize your contacts and make them easier to find, you can create additional groups.
Create a group
Click the Add button in the sidebar, then choose New Group.
A new group is added, with a placeholder name.
Type a name for the group, then press Return or Enter.
To change the group name, double-click it and type a new name in the text field.
Groups appear in alphabetical order in the sidebar on the left.
Add contacts to a group
Click All Contacts.
Drag one or more contacts from the All Contacts group to another group on the left. You can add a contact to more than one group.
When you add a contact to another group, the contact also remains in the All Contacts group.