Authors: We Johns
- Arbuthnot, John 1667-1735
- Archard, Charles J. (Charles John) 1860-1916
- Archer, John Wykeham 1808-1864
- Arfstrom, Jon 1928-2015
- Argyll, John Douglas Sutherland Campbell, Duke of 1845-1914
- Arlidge, J. T. (John Thomas) 1822-1899
- Armstrong, John 1709-1779
- Armstrong, John -
- Arndt, Johann 1555-1621
- Arthur, John W. (John William) 1848-1921
- Arundell of Wardour, John Francis Arundell, Baron 1831-1906
- Arvidson, Linda 1884-1949
- Ashton, John 1834-1911
- Aspley, John Cameron 1888-1969
- Asser, John -909
- Astor, John Jacob 1864-1912
- Atkins, J. B. (John Black) 1871-1954
- Atkins, John 1685-1757
- Atteridge, A. Hilliard (Andrew Hilliard) -1941
- Atwater, John Birdseye 1855-1921
- Aubrey, John 1626-1697
- Audubon, John James 1785-1851
- Audubon, John Woodhouse 1812-1862
- Aughey, John H. (John Hill) 1828-1911
- Aulde, John 1846-
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