John Kennedy chose his own brother, Robert, to be his administration's Attorney General.

Photo John F. Kennedy: By White House Press Office (WHPO) - http://www.jfklibrary.org/Asset+Tree/Asset+Viewers/Image+Asset+Viewer.htm?guid={959B8D46-B5E7-40E8-A0BD-60E09229B8C3}&type=Image, Public Domain, https://commons.wikimedia.org/w/index.php?curid=1393796. Photo Robert F. Kennedy: By Photo by Warren K. Leffler [Public domain], via Wikimedia Commons.