Exhibit 24

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below does hereby constitute and appoint WILLIAM C. LOSCH III, JEFF L. FLEMING, CLYDE A. BILLINGS, JR., and DANE P. SMITH, jointly and each of them severally, his or her true and lawful attorney-in-fact and agent, with full power of substitution and re-substitution, for him or her and in his or her name, place, and stead, in any and all capacities, to execute and sign the Annual Report on Form 10-K for the fiscal year ended December 31, 2017 to be filed with the Securities and Exchange Commission (the “SEC”) pursuant to the provisions of the Securities Exchange Act of 1934 by First Horizon National Corporation and, further, to execute and sign any and all amendments thereto and to file the same, with all exhibits thereto and other documents in connection therewith, with the SEC, granting unto said attorneys-in-fact and agents, and each of them, or their or his or her substitute or substitutes, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all the acts that said attorneys-in-fact and agents, or any of them, or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Signature	Title	Date
/s/ D. Bryan Jordan ______________________________ D. Bryan Jordan	Chairman of the Board, President, and Chief Executive Officer and Director (principal executive officer)	February 28, 2018
/s/ William C. Losch III ______________________________ William C. Losch III	Executive Vice President and Chief Financial Officer (principal financial officer)	February 28, 2018
/s/ Jeff L. Fleming __________________________ Jeff L. Fleming	Executive Vice President and Chief Accounting Officer (principal accounting officer)	February 28, 2018
/s/ John C. Compton __________________________ John C. Compton	Director	February 28, 2018
/s/ Mark A. Emkes __________________________ Mark A. Emkes	Director	February 28, 2018
/s/ Peter N. Foss __________________________ Peter N. Foss	Director	February 28, 2018

1 of 2

Signature	Title	Date
/s/ Corydon J. Gilchrist __________________________________ Corydon J. Gilchrist	Director	February 28, 2018
/s/ Scott M. Niswonger __________________________________ Scott M. Niswonger	Director	February 28, 2018
/s/ Vicki R. Palmer __________________________________ Vicki R. Palmer	Director	February 28, 2018
/s/ Colin V. Reed __________________________________ Colin V. Reed	Director	February 28, 2018
/s/ Cecelia D. Stewart __________________________________ Cecelia D. Stewart	Director	February 28, 2018
/s/ Rajesh Subramaniam __________________________________ Rajesh Subramaniam	Director	February 28, 2018
/s/ R. Eugene Taylor __________________________________ R. Eugene Taylor	Director	February 28, 2018
/s/ Luke Yancy III __________________________________ Luke Yancy III	Director	February 28, 2018

2