[ilal2ielli]

Spoiler:

in the ova continuity kiyone is the official name of tenchi's mom. tennyo is tenchi's sister, but how that works out i have no clue since she's supposedly 80 and nobuyuki is nowhere near that old.

anyway, here's a link to a tenchi muyo family tree that sorta clears things up. http://tmau.fateback.com/articles/family_tree.html

edit: hmph.. can't get spoiler tags to work?

edit: i can't spell late at night.