Statistics for occurrence #1 of “J. J. Allen” in chapter 41 of Admiral David D. Porter, The Naval History of the Civil War.:

.... Reilly. Acting-Volunteer-Lieutenant, Charles A. French; Acting-Masters, W. B. Newman and W. F. Pratt; Acting-Ensigns, T. B. Stokes and J. R. Peacock; Acting-Master's Mates, G. W. Pratt and J. J. Allen , Jr.; Acting-Assistant Surgeon, Wm. H. Holmes; Acting-Assistant Paymaster, Addison Pool; Engineers: Acting-Second-Assistant, Wm. F. Goff; Acting-Third-Assistants, J. B. Farrand, J. A. Strieby and Jos...
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J. J. Allen 9 2 1 0 0 user votes

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