John Shreeve, Jr.

an artist who provided work for the Native American flag of Philadelphia ( confirmed )

"the artist of Philadelphia is dead" Intelligencer Journal
16 Jul 1879, Wed ·Page 2 ( https://www.newspapers.com/image/557091672/?terms=%22John%20Shreeve... )

although he provide artwork for the flag, John seems to become a Republican in later life. ( see: The Philadelphia Inquirer
25 Jan 1879, Sat ·Page 2 ( https://www.newspapers.com/image/167874534/?terms=%22John%20Shreeve... ) !• under the Heading "Republican City committee" subsection says he was in Philadelphia's 9th Ward

example of work:

https://digital.librarycompany.org/islandora/object/digitool%3A65608
Date [ca. 1855]
Physical Description 1 print: lithograph; 34 x 48 cm. (13.5 x 19 in.)
Description View of the ornately decorated hose carriage of the company founded on August 17, 1805 by male residents living near Second and Pine streets. Ornamentations include silver plated bells; swan figurines; and a painted scene showing heavenly figures. Image surrounded by oval frame decorated with floral elements.