He was born on 20 March 1837 (11; 9 (21 in 1861)). He was born in County Antrim, Ireland (11). He was born to Samuel Atcheson Molyneaux and Jane Wilson (11).
He enlisted and was mustered into service on 9 October 1861, at Philadelphia, Pennsylvania (1, 9 [as 1st sgt]). He was in company B (1), apparently as one of the original sergeants (6, 14 (pvt), 15 (pvt)).
On 20 August 1862, he testified (briefly!) for the defense at Alpheus Bowman's court martial (4).
On 12 March 1863, he returned to the regiment from a furlough (2).
He was promoted to orderly sergeant on 1 May 1863 (3).
He fought at the Battle of Gettysburg (13).
He was killed in action on 2 July 1863 at Gettysburg, Pennsylvania (1, 6, 7, 8, 9, 11 [3 Jul]). He was buried at the National Cemetery, Gettysburg, section B grave 83 (1, 5, 9). He was first sergeant of company B (1, 14 (sgt), 15 (sgt)).
On 26 May 1866, his father, Samuel W Molyneux, successfully applied from Canada for a pension (10, 12).
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) (J W Molyneaux)
2 consolidated morning report, 91st PA, 12 March 1863 (Sergt Molyneaux)
3 consolidated morning report, 91st PA, 8 May 1863 (John W Molyneaux)
4 court-martial record, Alpheus Bowman
5 tombstone (Thanks to Chris Buckingham for the picture!) (J W Molineaux)
6 list of non-commissioned officers, co.B (John W Molyneaux)
7 company B Register of deaths (John Molyneaux)
8 company B [first] descriptive roll, entry 3 (John W Molyneaux)
9 Civil War Veterans' Card File, available at the Pennsylvania State Archives, searched 30 May 2004 (J W Molyneaux; rolls also have 'Molynoux')
10 pension index, by regiment (John W Molyneux)
11 "Pritchard/Johannsen/Kenney and Gatineau Families", a GEDCOM available on Rootsweb.Com WorldConnect, updated 8 March 2004 (searched 6 January 2006) (John Wilson Molyneaux)
12 pension index, by name (John W Molyneux)
13 Pennsylvania Memorial, Gettysburg, Pennsylvania (John W Molinyneaux [sic])
14 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (John W Molyneux)
15 index to compiled service records of volunteer Union soldiers who served in organizations from the state of Pennsylvania (John Molyneaux)