[@Raqueltrper]

Hello! The latter, canon houses with (very likely) your own OCs. If there is a house that actually has known members at this time, we would expect that they remain as existing entities, even if you choose to not RP them as your characters. 

There are very few houses that have known characters in the lore during this period, so it is wide open with possibilities. Also always happy to help brainstorm ideas for houses.