He was born in 1838/39 (3 (22 in 1861)). He was born in New York state (3).
When he enlisted, he was a machinist (3).
When he enlisted, he was 5 feet 6 inches tall, and had a dark complexion, dark eyes, and dark hair (3).
He enlisted before enlisting in the 91st (3).
He enlisted and was mustered into service on 15 October 1861 (1, 3). He was enlisted for three years, by Lieutenant Pierce, at Philadelphia, Pennsylvania (3). He was a corporal in company F (1, 4, 5).
1 Bates, Samuel Penniman. History of Pennsylvania volunteers, 1861-5. Harrisburg: B. Singerly, state printer, 1869-71. 5 volumes. 'Ninety-first regiment', volume 3, pages 186-233. (In the roster) (John Brosnaham)
2 company F, register of deserters, #1 (John G Brosnahan)
3 company F, descriptive roll, #13 (John G Brosnahan [the 'n' is clear])
4 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (John G Brosnahan)
5 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (John Brosmahan)
BROSNAHAN.--16th inst., HANORAH [sic], wife of John D Brosnahan and daughter of late George and Ellen Barnett. Relatives and friends also the Sacred Heart Confraternity of St Ann's, invited to funeral, Sat. 8.30 A M, husband's residence, 2307 E Huntingdon st. Solemn requiem mass, St Ann's, 10 AM Interment New Cathedral.