A father of someone's parent.
A male forefather.
The archived older version of a file that immediately preceded the father file.
To retain discontinued laws or rules for (a thing, person or organization previously affected by them).
To be, or act as, a grandfather to.
A son of one's cousin or cousin-in-law
A son of one's sibling, brother-in-law, or sister-in-law; either a son of one's brother (fraternal nephew) or a son of one's sister (sororal nephew).