#forebear__forbear  a person from whom you are descended
  supertype:  ancestor__ascendant__ascendent__antecedent__root  someone from whom you are descended (but usually more remote that a grandparent)
  subtype:  grandparent  a parent of your father or mother
     subtype:  grandfather__gramps__granddad__grandad__granddaddy__grandpa  the father of your father or mother
     subtype:  grandma__grandmother__granny__grannie__gran  the mother of your father or mother
        subtype:  nan.grandma  (British) your grandmother
  subtype:  great_grandparent__greatgrandparent  a parent of your grandparent
     subtype:  great_grandmother__greatgrandmother  a mother of your grandparent
     subtype:  great_grandfather__greatgrandfather  a father of your grandparent

No statement uses or specializes forebear; click here to add one.