Sarah Andrew Mills Married William Willox on 28 December 1921

They had four children. Vincent, William, isabel and Robert. Robert is my grandad. Grandad (Robert) was born 1924 Coatbridge Glasgow. He immigrated to New Zealand start 1946. I would like to know more information about both sides (The Mills) and the Willox side.
When was Sarah Andrew Mills born and who were her parents. When was William Willox born. Also would be interested to hear from family.