Wikipedia tells me that certain children of emperors were demoted (removed from the royal lineage) and assigned to Taira as well as Minamoto "clans" during the Heian period.
How did this work?
- Was there a special rationale for assigning people to one over the other?
- Were clans supposed to be the overriding social identity for their members?
- Did they provide/require special services?
- How did the generational component (e.g. Saga vs. Seiwa Genji) influence the situation? For example, did Saga and Seiwa Genji both identify as Minamoto and were therefore more likely to cooperate with each other than with other clans?