Adlai E. Steveson

Democrats nominated Adlai Ewing Stevenson, grandson of Adlai Ewing Stevenson, for president in 1952 and 1956.

He also served as an ambassador to the United Nations.

His son, Adlai Ewing Stevenson III, served as a senator and fathered Adlai Ewing Stevenson IV, a journalist and businessman, who in turn fathered Adlai Ewing Stevenson V, a son, born in 1994.

https://en.wikipedia.org/wiki/Adlai_S...