For anyone else researching the Ancestry of this family, consider Catherine/Katherine Horton is the daughter of Christopher Horton of Catton (died 1583). The dates fit, and the Will of Christopher Horton lists his unmarried daughter Katherine and son Walter.
A2A also has a reference to Marie Horton widow of Catton, leaving items to her daughter Katherine, wife of Henry Leigh in 1616. Marie Horton, widow of Christopher died in 1625.
Mary/Marie (widow of Gabriel Chamber) was Christopher's second wife with them marrying circa 1571. Currently suspect Walter to be his son by his first wife and Katherine by his second.