In that situation, they were discriminated from by being called their residence's name (sometimes it became their posthumous title after their death) or Ichiin (or Honin), Chuin (when there were more than three) or Shinin in their reign order.
その際には御在所の名称で呼ぶ（場合によっては崩御後にそのまま追号となる場合もある）か、在位の前後において一院（本院とも）・中院（3名以上いる場合）・新院と呼んで区別した。