Statistics for occurrence #1 of “McGowan” in chapter 4.23 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War. Volume 4.:

...from North Carolina and South Carolina up to May 15th, approximated 30,000. The losses of these armies are only partially reported. In the Wilderness Ewell's corps lost 1250 killed and wounded; McGowan 's brigade (Wilcox's division), 481 killed, wounded, and missing; Lane's brigade (Wilcox's division), 272 killed and wounded, and 143 missing; Kershaw's brigade (under Henagan), 57 killed, 239 wounded...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Samuel McGowan 238 18 26 4 0 user votes
McGowan 273 0 51 0 0 user votes
S. McGowan 113 0 5 0 0 user votes
John McGowan 57 0 5 0 0 user votes
S. C. McGowan 28 0 0 0 0 user votes
Patrick McGowan 22 0 0 0 0 user votes
George McGowan 16 0 0 0 0 user votes
J. McGowan 14 0 0 0 0 user votes
J. E. McGowan 9 0 1 0 0 user votes
Gen S. McGowan 8 0 0 0 0 user votes
Alden T. McGowan 6 0 0 0 0 user votes
Pat McGowan 6 0 0 0 0 user votes
William A. McGowan 6 0 0 0 0 user votes
John R. McGowan 4 0 0 0 0 user votes
Ned McGowan 4 0 0 0 0 user votes
James McGowan 2 0 0 0 0 user votes
John J. McGowan 2 0 0 0 0 user votes
John W. McGowan 2 0 0 0 0 user votes
Martin McGowan 2 0 0 0 0 user votes
R. W. McGowan 2 0 0 0 0 user votes
Rodney W. McGowan 2 0 0 0 0 user votes
Thomas J. McGowan 2 0 0 0 0 user votes
— Mcgowan 2 0 0 0 0 user votes
H. McGowan 1 0 1 0 0 user votes
Homer McGowan 1 0 1 0 0 user votes
J. H. McGowan 1 0 1 0 0 user votes
John F. McGowan 1 0 1 0 0 user votes
Robert McGowan 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.