Before the 1919 Act, the Tennessee Grand Jury consisted of 13 jurors and the Judge would appoint one of them to be the foreman/foreperson. In the 1919 Act, the number of jurors from the jury pool was reduced to twelve and a foreperson was added, who was appointed and selected by the Judge. The twelve are selected by drawing names randomly, just as is done today and the foreperson needs to have all the qualifications of a juror and is a member of said Grand Jury although he is not impaneled or summoned
Impanel (v) – The act of selecting a jury from the list of potential jurors, called the “panel” or “venire.” The steps are: 1) drawing names at random from a large number of jurors called; 2) seating 12 tentative jurors (or six where agreed to); 3) hearing individual juror requests for being excused, to be determined by the judge; 4) questions from judge and lawyers for both sides; 5) challenges of tentative jurors either for cause (decided by the judge) or peremptory (no reason given) by the lawyers; 6) swearing in the jurors who survive this process. See also TCA 22-2-310 Impaneling jurors
Summon (v) - To order to come; send for, esp to attend court, by issuing a summons. See also T.C.A 22-2-307 Summoning jurors
Juror (n) – T.C.A. 39-16-101 (1) ”Juror” means any person who is a member of any jury, including a grand jury, impaneled by any court of this state or by any public servant authorized by law to impanel a jury. “Juror” also includes any person who has been summoned or whose name has been drawn to attend as a prospective juror;
Once the jurors have been randomly selected to form a jury panel, they are summoned by the Sheriff to appear and then the Judge selects the Grand Jury as explained in Rule 6. Contrary to the beliefs of some, the judge indeed selects the jurors, as outlined in the T.C.A. and Rule 6.
Note that the grand jury is also discussed in T.C.A 40 -12 and TCA 16-2-510 explains how Grand Juries are impaneled, and contrary to the beliefs that Rule 6 does not reflect Tennessee Statute, it clearly does.
16-2-510. Holding of court — Terms abolished — Grand juries.
(c) New grand juries shall be impaneled at least twice a year at times selected by the presiding judge of the district. The presiding judge within each district shall be responsible for designating the foreperson and for impaneling, charging and receiving the report of the grand jury, but may designate another judge to perform these responsibilities. In those districts in which there is a criminal court judge or judges, the criminal court judge or judges shall perform the duties pertaining to the grand jury assigned to the presiding judge by this subsection (c).