From appearances in the books, Houses need not have any living members to still be remembered as a house. Once the house is set up, by either the king, or a high lord, all of the family will be part of that house,house; whether they got land to begin with, or looselose the land somewhere in time, they will still be a house. So these houses you have listed are most likely minor houses, or great houses that have been replaced. theyThey may or may not still have land somewhere in westerosWesteros, and they may have multipulmultiple people left in their familysfamilies, or they could be the last of their respective houses.