Cognomen Yousui (Yousui) , in all the world, is an extremely rare last name.
ヨウスイ, 友岁, 友碎, 友穗, 友隋, 友随, 囿燧, 尤随, 幼穗, 悠随, 攸随, 有岁, 有碎, 有穗, 有绥, 有遂, 有随, and 游随
