Julian Cope presents Head Heritage

I don't really know the answer to that. The whole peninsula is covered with settlements from this period (CE and Chysauster are the best known and generally best preserved, but there are big compact settlements elsewhere like Bosullow Trehyllys and scattered ones like Bosprennis, as well as numerous smaller sites). How closely related the inhabitants were is difficult to know without DNA evidence, but four courtyard houses presumably represents four families?

Perhaps an anthropological fieldtrip to the Forest of Dean by way of comparison might help establish how closely related a community can be :)