Zuethron was born among the common folk, with no house or name in the chronicles, and entered House Guibre by marrying Maislerk. She was forgiving, loyal and patient, with a gift for keeping the accounts. From year 187 she was at the head of Zailira until her death. She decided to lift the rationing. She lived under the rule of Sauchia, Salziark and Mendbrark. She knew hunger in Zailira. She died of hunger in the summer of year 189, at the age of 34. With her death House Guibre went out.