About John Seys
Lived 1799 – 1872 (aged 72–73). John Seys was a priest, diplomat, missionary and reverend.
John Seys (March 30, 1799 – February 9, 1872) was an American reverend, missionary, and diplomat.
Biography Seys was born in St. Croix, in the Danish West Indies, to a wealthy white family on March 30, 1799. Born Jan Seij, his family were slave owners. He anglicized his name when he moved to the British West Indies as a young adult. After ordination, he briefly served on the island of Tortola before obtaining a position in Ogdensburg, New York. He moved to Canton, New York, in 1832 and then became a missionary among the Oneida people in 1833. During his time in leadership he became actively involved in establishing new schools in the country.
From 1856 to 1858, Seys served as a special agent of the American Colonization Society scouting settlement locations for freed slaves in Liberia that were at an elevated location less prone to malaria. This resulted in the founding of Careysburg in 1856, followed by the building of a chapel there. From 1858 to 1862, Seys acted as a United States government agent helping the freed passengers of slave ships captured by the U.S. Navy, having responsibility for up to four thousand men, women and children at a time. He also served as acting Consul General when the incumbent died. In this position, Seys faced many obstacles due to the lack of funds coming from the United States. In a February 11, 1871, report to the U.S. House of Representatives, Representative Thomas Swann from the United States House Committee on Foreign Affairs stated that Seys "charges salary for sixty days, and also for fifty-eight days, transit in returning to his post, and for the services of W.A. Johnson, vice consul general, $166.66 for four months" which the committee recommended he not be paid. Despite this, he actively pushed against what he saw as the evils of slavery. Although he was opposed to the practice of slavery, he would write in defense of Captain Nathaniel Gordon at Gordon's trial for slave trafficking and piracy. Returning to the United States in 1870, he retired to the Cincinnati, Ohio, area. after having fathered 12 children with five different women, however many died before him due to 'African fever.'
Don’t just read it —
keep it.
Full-length biographies made to live with: read them, listen on the way to work, watch them tonight.
- E-book
- Audio
- Video
Instant download · yours to keep · every purchase keeps this site free
Important facts
People in John Seys's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped John Seys's
Frequently asked questions
Who was John Seys?
American reverend, missionary, and diplomat
When was John Seys born?
John Seys was born on 30 March 1799 in Saint Croix.
When did John Seys die?
John Seys died in 1872 in Springfield.
What was John Seys's occupation?
John Seys was a priest, diplomat, missionary and reverend.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). John Seys. https://biography.guide/john-seys/
MLA: "John Seys." Biography.guide, https://biography.guide/john-seys/.
Chicago: "John Seys." Biography.guide. https://biography.guide/john-seys/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
Page generated 2026-09-27 05:22 UTC