Statistics for occurrence #1 of “Dahlgren” in chapter 50 of Admiral David D. Porter, The Naval History of the Civil War.:

...erform it in the ordinary course of his profession. Surgeon Longshaw was recommended for promotion in his corps by the Chief of the Bureau of Medicine and Surgery. On December 6th, Rear-Admiral Dahlgren had the misfortune to lose the Monitor Weehawken under the following circumstances, as given in the report of Commander J. M. Duncan: On the morning of the 5th I arrived here, and in the evening...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
John A. Dahlgren 432 197 18 5 0 user votes
Ulric Dahlgren 958 0 42 0 0 user votes
Dahlgren 827 0 205 0 0 user votes
J. A. Dahlgren 209 24 1 0 0 user votes
U. Dahlgren 131 0 1 0 0 user votes
John Adolph Dahlgren 70 0 4 0 0 user votes
Charles B. Dahlgren 55 3 5 1 0 user votes
John Dahlgren 27 0 13 0 0 user votes
Ulrich Dahlgren 17 0 1 0 0 user votes
Ad Dahlgren 16 0 0 0 0 user votes
J. H. Dahlgren 10 0 0 0 0 user votes
Charles G. Dahlgren 5 0 1 0 0 user votes
Jonathan A. Dahlgren 4 0 0 0 0 user votes
C. G. Dahlgren 2 0 0 0 0 user votes
M. V. Dahlgren 2 0 2 0 0 user votes
Madeleine Vinton Dahlgren 2 0 0 0 0 user votes
Madeline Vinton Dahlgren 1 0 1 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.