Exhibit 5.2

First Horizon National Corporation,
           165 Madison Avenue,
                       Memphis, Tennessee 38103.

Ladies and Gentlemen:

In connection with the issuance and sale of (i) $450,000,000 aggregate principal amount of 3.550% Senior Notes due 2023 and (ii) $350,000,000 aggregate principal amount of 4.000% Senior Notes due 2025 (together, the “Notes”) of First Horizon National Corporation, a Tennessee corporation (the “Company”), pursuant to the Underwriting Agreement, dated May 20, 2020, between the Company and Morgan Stanley & Co. LLC, Barclays Capital Inc., FHN Financial Securities Corp., Goldman Sachs & Co. LLC and J.P. Morgan Securities LLC, as the Representatives of the several Underwriters listed therein, we have examined such corporate records, certificates and other documents, and such questions of law, as we have considered necessary or appropriate for the purposes of this opinion. The Notes were issued pursuant to an Indenture, dated as of December 20, 2010, as supplemented by the Supplemental Indenture No. 1, dated as of May 26, 2020 (together, the “Indenture”), between the Company and The Bank of New York Mellon Trust Company, N.A., as Trustee (the “Trustee”).

Upon the basis of such examination, it is our opinion that the Notes constitute valid and legally binding obligations of the Company, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors’ rights and to general equity principles.

The foregoing opinion is limited to the laws of the State of New York and the laws of the State of Tennessee, and we are expressing no opinion as to the effect of the laws of any other jurisdiction. With respect to all matters of Tennessee law, we have relied upon the opinion, dated the date hereof, of Charles T. Tuggle, Jr., Executive Vice President and General Counsel of the Company, and our opinion is subject to the same assumptions, qualifications and limitations with respect to such matters as are contained in such opinion of Charles T. Tuggle, Jr.

We have relied as to certain matters upon information obtained from public officials, officers of the Company and other sources believed by us to be responsible, and we

have assumed that the Indenture has been duly authorized, executed and delivered by the Trustee, that the Notes conform to the specimen thereof examined by us, that the Trustee’s certificate of authentication of the Notes has been executed by one of the Trustee’s authorized officers, and that the signatures on all documents examined by us are genuine, assumptions which we have not independently verified.

We hereby consent to the filing of this opinion as an exhibit to this Current Report on Form 8-K and, through incorporation, to the Company’s Registration Statement on Form S-3 (File No. 333-229338). In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act of 1933.