no, it's part of the 19th century.
18th century AD: 1701-1800
19th century AD: 1801-1900
18th century BC: 1800-1701
19th century BC: 1900-1801
1826 is in the 19th century, which runs from 1801 to 1900.
Isaac Shelby died on 1826-07-18.
George Symons was born on 1826-03-18.
Battle of Arachova happened on 1826-11-18.
Alexander McNair died on 1826-03-18.
when did paul g. Allen die? August 18, 1826
John Neptune Sargent was born on 1826-06-18.
Rufus S. Frost was born on 1826-07-18.
Émile-Justin Menier was born on 1826-05-18.
Frederick Augustus Smith was born on 1826-11-18.
They were starting to use surnames on the beginning of 19th century in Estonia. First time, when surnames were written down was during the census on 1826 in Livonia (part of Estonia was involved) and on 1834 in Estonia.
18 century