Note
祖父 is a formal alternative for grandfather. You might encounter this word in written contexts or official documents. In most contexts it's advised to use お祖父さん instead, as it sounds more friendly and respectful.
Breakdown of sofu
father
父
ancestor
祖
You now exist because your ancestors displayed the wisdom to have another one.
Usages of sofu
祖父 は 七十歳 で 亡くなった。sofu wa nanajussai de nakunatta.
