Jiro Is A Boy’s Name With Japanese Origins. A Beautiful And Eye-catching Name, Jiro Means “second Son” But Isn’t Always Just Reserved For The Second-born Boy. In Recent Decades, People Haven’t Stalled In Calling Their Son Jiro. It’s No Wonder, It’s Such A Gorgeous Name, Why Wait For A Possible Second Born Son? Jiro Is A Great Choice For Those With Japanese Roots Or Love Names Beginning With J.