My co-grandfathers are both very wise and loving.

My maternal grandfathers are both from Ireland.

My great-grandfathers were all hardworking men.

My great grandfathers were both war veterans.

My grandfathers-in-law are coming over for dinner tonight.

My great-great-grandfathers immigrated to America in the early 1900s.

My co-grandfathers-in-law attended the family reunion.

My great great grandfathers were hardworking farmers.

My great-grandfather lived to be 100 years old.

My grandfather clock chimes every hour.