Knight U K and Savage

MY GREAT GRANDFATHER MARRIED A LADY BY THE NAME OF KNIGHT IN THE NORTH OF ENGLAND. DO NOT KNOW WHERE. SHE HAD 3 CHILDREN BY A PREVIOUS MARRIAGE. CHARLES, HARRY, AND ROSE KNIGHT. THEIR SON JOHN JOSEPH WAS BORN IN 1874. HE WENT TO IRELAND AND MARRIED MY GRANDMOTHER JULIA BIRMINGHAM I KNOW THERE WAS 2 MORE GIRLS SISTERS TO JOHN J. I HAVE SEARCHED EXTENSIVELY IN U.K. BUT CANNOT FIND MRS KNIGHTS FIRST NAME OR MY GRANDFATHERS PLACE OF BIRTH. THEIR SURNAME WAS SAVAGE.ON MY GRANDFATHERS MARRIAGE CERTIFICATE HE HAD SIGNED ITJOHN KNIGHT SAVAGE AND THEN KNIGHT WAS CROSSED OUT? WOULD APPRECIATE ANY INFORMATION ON THIS FAMILY.