Era
20th century
31
1906-1975
25
1821-1910
22
1928-2017
14
1903-1986
13
19th century
10
17th century
7
1900-1999
7
1930-
7
1821-1893
5
1870-1946
4
1871-1937
4
1925-2014
4
Civil War, 1861-1865
4
1779-1800?
3
1846-1950
3
1911-2009
3
1920-
3
1931-2016
3
-1800
2
1624 or 5-1690
2
1634-1659
2
1684 or 1685-1714
2
1768
2
1833-1885
2
1898-1985
2
18th century
2
1905-
2
1909-1981
2
1914 - 1918
2
1915-1959
2
1925-
2
1935-
2
1940-
2
1943-
2
1947-
2
1954-
2
1962-
2
1969-
2
1981-1989
2
1989-
2
Ismail, 1863-1879
2
-1869
1
-1898
1
1568-1645
1
1573-1645
1
1575-1641
1
1581-1666
1
1600-1661
1
1623 or 4-1668
1
more ...