Red Jacketc. 1835 print after a paintingby Charles Bird King(1785-1862)Red Jacket Originally Segoyewatha. 1756?-1830. Seneca leader who advocated peace with the United States while resisting the geographic and cultural encroachment of settlers.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.