Statistics for occurrence #1 of “J. W. Cortelyou” in chapter 20 of Admiral David D. Porter, The Naval History of the Civil War.:

...aster's Mate, J. B. Johnson. Acting-Master's Mate, J. H. Butler. Acting-Master's Mate, G. W. Lane. Acting-Master's Mate, John Bath. Acting-Master's Mate, Anthony Loper. Acting-Master's Mate, J. W. Cortelyou . Acting-Master's Mate, Thomas Levindsell. Acting-Master's Mate, R. M. Clark. Acting-Master's Mate, Thomas McEllmell. Acting-Master's L. A. Brown. Assistant Surgeon, C. S. Giberson. ...
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J. W. Cortelyou 2 2 0 0 0 user votes

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