Joan was the daughter of unknown parents. The date and place of her birth have not been found.
She had two marriages/partners. Her first husband was Eudo II la Zouche. They were married, but the date and place have not been found. Their two known children were Isabel (c1320-1349) and William (c1321-1382).
Her second husband was William Moton. They were married, but the date and place have not been found. Their only known child was sir Robert (?-1367).