A group of eight can be called an octad (things) or an octet (often performers), or even an eightsome. A related adjective is octonary (related to or based on eight). In Egyptian Mythology there was a group of eight deities called the Ogdoad (the eightfold). There are also groups that are comprised of eight that go by other things. The "Group of Eight" industrialized countries is known just like that, or by the abbreviation G8. There is also a group called the "Group of Eight" that are Australian Universities.
Group of Eight can be found online and is a group of leading Australian Universities. On their website one will find several side links that will lead to various things. Things such as events, publications, brochures, and so much more.
A singing group of eight is called an octet.
An Octet is a group of eight people.
Carrier Strike Group Eight was created in 2004.
Group eight
octet
How many spectators take part in the group of eight summit
octet
Tata group
A group of eight anything is called an "octet".
A group of twelve things is called a dozen.