POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that the undersigned
does hereby constitute and appoint
Clyde A. Billings, Jr., John A. Niemoeller, and
Shannon M. Hernandez jointly
and each of them severally, the undersigned?s true and lawful
attorney-in-fact and agent, with full
power of substitution and resubstitution, for the undersigned
and in the undersigned?s name, place and stead, in any and all
capacities, to:

(1)	execute for and on behalf of the undersigned, in the
 undersigned?s
capacity as an officer
and/or director of First Horizon National Corporation
 (the ?Corporation?),
Forms 3, 4 and 5 and any and all amendments thereto in
 accordance with
Section 16(a) of the Securities
Exchange Act of 1934, as amended (the ?Exchange Act?),
and the rules
 thereunder; and

(2)	do and perform any and all acts on behalf of the
undersigned
which may be necessary or
desirable to complete and execute any such Forms 3, 4 or
5 or an
amendment thereto
and timely file such form with the Securities and Exchange
Commission
and any stock exchange or similar authority; and

(3)	take any other action of any type whatsoever in
connection
with the foregoing which, in the opinion
of such attorney-in-fact, may be of benefit to, in the best interest
of, or legally
required by,
the undersigned, it being understood that the documents being
 executed by
such attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney
 shall be in such form and shall contain such terms and conditions
as such
attorney-in-fact may approve in
such attorney-in-fact?s discretion.

The undersigned hereby grants to each such attorney-in-fact full
power and
authority to do and perform any
and every act and thing whatsoever requisite, necessary, or
proper to be
done in the exercise
of any of the rights and powers herein granted, as fully to all
 intents and purposes as the undersigned might or
could do if personally present, hereby ratifying and confirming
all that
such attorney-in-fact, or such attorney-in-fact?s substitute or
 substitutes,
shall lawfully do or cause to be done by
virtue of this Power of Attorney and the rights and powers
herein granted.
The undersigned acknowledges that
the foregoing attorneys-in-fact, in serving in such capacity
at the request
of the undersigned, are not assuming, nor is the Corporation
assuming, any of the undersigned?s responsibilities to
comply with
Section 16 of the Exchange Act.

This Power of Attorney shall remain in full force and
effect until the
undersigned is no longer required to file
 Forms 3, 4 and 5 with respect to the undersigned?s holdings
of and
 transactions in securities issued
by the Corporation, unless earlier revoked by the
undersigned in a
signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has executed
 this Power of
Attorney as of this 6th day of July, 2016.




Rajesh Subramaniam