Robert Downey Jr.'s father is Robert Downey. Westerners are used to using the same name for two or even several generations. In order to distinguish them, the father adds "sr" after his name, which translates as "old", and the son adds "J" after his name, which translates as "little" or so-and-so II.
By analogy, the third generation of this name in the family is called XXX III.
Extended data
Robert Downey Jr.'s father, robert towne, is a film writer and director. He has created many artistic films, half of which are Lithuanian Jewish, a quarter Hungarian Jewish and a quarter Irish. Mother Elsee is an actress with German, English, Swiss, German and Scottish ancestry. The couple divorced on 1978.
My grandfather, Robert Elias, is a Jew and works in restaurant management. Grandma Elizabeth is a model, half Irish, half Hungarian Jewish.