There are plans to emphasize different themes each night of the convention. Mr. Trump wants to touch on a few of his favorite hot-button issues, like the 2012 attack on the American diplomatic compound in Benghazi, former President Clinton’s infidelities and border security. All four of Mr. Trump’s adult children are scheduled to speak.

There also will be governors like Rick Scott of Florida and Scott Walker of Wisconsin, and members of Congress like Representatives Sean P. Duffy of Wisconsin and Marsha Blackburn of Tennessee. The National Rifle Association will be represented by Chris Cox, executive director of the group’s political arm. Antonio Sabato Jr. is one Hollywood star who has been confirmed by the Trump campaign.

Mr. Trump is still inviting people, his aides have said. And the people who spoke about his list of speakers cautioned that it could still grow.

But what is striking, as much as who is on the list, is who is not. Several figures Mr. Trump had said he would invite to speak, like the boxing promoter Don King and Sarah Palin, the former Alaska governor, were not included. Neither was Tom Brady, the New England Patriots quarterback, a hugely popular figure in the key state of New Hampshire.

The list, which is subject to change, as obtained by The New York Times:

Night 1: A Benghazi focus, followed by border patrol agents and Mr. Shaw, whose son was killed by an undocumented immigrant. Senator Cotton, Mr. Giuliani, Melania Trump, Ms. Ernst and others.

Night 2: A focus on the economy: Mr. White, president of the U.F.C.; Asa Hutchinson, the governor of Arkansas; Michael Mukasey, the former United States attorney general; Lt. Gen. Michael Flynn, a vice-presidential possibility; Senator Mitch McConnell of Kentucky, the majority leader; Mr. Trump’s daughter Tiffany; his son Donald Jr.; and Governor Walker.

Night 3: Ms. Bondi; Ms. Collins; Newt Gingrich, a former House speaker; Senator Ted Cruz of Texas; Mr. Trump’s son Eric; Ms. Gulbis; and the nominee for vice president.