ASV: His parents answered and said, We know that this is our son, and that he was born blind:

BBE: In answer his father and mother said, We are certain that this is our son and that he was blind at birth:

DBY: His parents answered them and said, We know that this is our son, and that he was born blind;

KJV: His parents answered them and said, We know that this is our son, and that he was born blind:

WEY: "We know," replied the parents, "that this is our son and that he was born blind;

WBS: His parents answered them and said, We know that this is our son, and that he was born blind:

WEB: His parents answered them, "We know that this is our son, and that he was born blind;

YLT: His parents answered them and said, 'We have known that this is our son, and that he was born blind;
