Ah, the 5 sons of moenghus. solves another one there, cut down by one of his others. I think thats all of them, i hope we dont find any more through this slog or I'll have to figure out another theory lol.
Preserved seed is a very probably way of maintaining a genetically diverse stock of people with limited mating partner choices, ie Ishual.
But with that, they can't technically be clones if they are 'made' that way. Just brothers. I think the functionally clones bit stems from identical rearing, which they would be intentionally doing to blot out all the messy nature stuff they can't breed away.
"Just say no to soul swapping" - Anonymous.