“Their seven Gad kindred according to their clans were Michael, Meshullam, Sheba, Jorai, Jacan, Zia, and Eber.”
There seems to be 7 clans of Gad. There are 11 biblical people with the name of Michael, including an angel. Surprisingly enough, there are 21 biblical people with the name of Meshullam. Sheba is the name of a place and a number of people. This is the only mention of Jorai, Jacan, and Zia. There were at least 5 people with the name of Eber.