From Naval History and Heritage Command "Officers List." Those who resigned from U.S. Navy in 1861.
Name and Rank: JOHN J. GUTHRIE, Lieutenant
Date of Tender of Resignation: ? July 1861
Date of Letter of Dismissal: July 15, 1861
Some of the lieutenant names that I recognized for their Confederate service:
George J. Sinclair
Isaac N. Brown
James J. Waddell