The daughter of someone's child.

A mother of someone's parent. / A female ancestor or progenitor.

A father of someone's parent. / (by extension) A male forefather. / (computing) The archived older version of a file that immediately preceded the father file.

(transitive) To be, or act as, a grandfather to.

(transitive, chiefly US, law) To retain discontinued laws or rules for (a thing, person or organization previously affected by them).

(of a person, their language or writing) Given to using language in a showy way by using an excessive number of difficult words to impress others; bombastic; turgid

A high-ranking nobleman in Spain or Portugal. / (by extension) A person of high rank.

The daughter of someone's grandchild.

The mother of one's grandparent.

The father of a grandparent.