Katherine was born possibly at Laxfield, County Suffolk, England. Her maiden name may have been Crispe. Unfortunately, no substanciating evidence has been found. Katherine married Symond Ffyske, son of Hugh Ffyske, circa 1434. Katherine's husband, Symond, died before 26 February 1464 in Laxfield at the Manor of Stradbaugh, leaving her a widow.