Question: What is the name of the main character of the comic book by an American comic book author and cartoonist which is about a centaur?

Context paragraphs:
Jules Feiffer: Jules Ralph Feiffer (born January 26, 1929) is an American syndicated cartoonist and author, who was considered the most widely read satirist in the country.  He won the Pulitzer Prize in 1986 as America's leading editorial cartoonist, and in 2004 he was inducted into the Comic Book Hall of Fame.  He wrote the animated short "Munro", which won an Academy Award for Best Animated Short Film in 1961.  The Library of Congress has recognized his "remarkable legacy", from 1946 to the present, as a cartoonist, playwright, screenwriter, adult and children’s book author, illustrator, and art instructor.

Stinz: Stinz is a comic book created by Donna Barr, chronicling the adventures of Steinheld Löwhard, or "Stinz"---a centaur who lives with other centaurs and "two-leggers" in an imaginary Alpine valley called the Gieselthal.

Comic book: A comic book or comicbook, also called comic magazine or simply comic, is a publication that consists of comic art in the form of sequential juxtaposed panels that represent individual scenes.  Panels are often accompanied by brief descriptive prose and written narrative, usually dialog contained in word balloons emblematic of the comics art form.  Although comics has some origins in 18th century Japan and 1830s Europe, comic books were first popularized in the United States during the 1930s.  The first modern comic book, "Famous Funnies", was released in the United States in 1933 and was a reprinting of earlier newspaper humor comic strips, which had established many of the story-telling devices used in comics.  The term "comic book" derives from American comic books once being a compilation of comic strips of a humorous tone; however, this practice was replaced by featuring stories of all genres, usually not humorous in tone.

Comet (DC Comics): Comet is the name of two fictional comic book characters owned by DC Comics whose adventures have been published by that same company.  The first character was a sapient horse with magical powers who was once a centaur in ancient Greece.  The second character is a shapeshifter with three forms (male, female, and winged centaur).  Both characters are connected to the "Superman" family of titles.

Donna Barr: Donna Barr (born August 13, 1952) is an American comic book author and cartoonist.

John Stanley (cartoonist): John Stanley (March 22, 1914 – November 11, 1993) was an American cartoonist and comic book writer, best known for writing Little Lulu comic book stories from 1945 to 1959.  While mostly known for scripting, Stanley also drew many of his stories, including the earliest issues of "Little Lulu" and its "Tubby" spinoff series.  His specialty was humorous stories, both with licensed characters and those of his own creation.  His writing style has been described as employing "colorful, S. J. Perelman-ish language and a decidedly bizarre, macabre wit (reminiscent of writer Roald Dahl)", with storylines that "were cohesive and tightly constructed, with nary a loose thread in the plot".  He has been compared to Carl Barks, and cartoonist Fred Hembeck has dubbed him "the most consistently funny cartoonist to work in the comic book medium".  Captain Marvel co-creator C. C. Beck remarked, "The only comic books I ever read and enjoyed were "Little Lulu" and "Donald Duck"".

Centaur Publications: Centaur Publications (also known as Centaur Comics) (1938–1942) was one of the earliest American comic book publishers.  During their short existence, they created several colorful characters, including Bill Everett's Amazing-Man.

Snapper Carr: Lucas "Snapper" Carr is a fictional character appearing in American comic books published by DC Comics.  The character, whose fictional nickname is almost always used by other characters in favor of his given name, was created by Gardner Fox (writer) and Mike Sekowsky (penciller), and made his first appearance in "The Brave and the Bold" in February 1960.  From 1960 to 1969, Snapper Carr appeared as a supporting character to the Justice League of America, a superhero team.  The character occasionally appeared in comics featuring the Justice League from 1969 to 1989, when the "Invasion! " limited-series comic book gave him superpowers.  He was associated with a new superhero team, The Blasters, in various comics until 1993, when he lost his powers and became a main character in the "Hourman" comic book.  After the cancellation of "Hourman" in April 2001, he became a main character in the "Young Justice" comic book beginning in December 2001.  "Young Justice" was cancelled in May 2003, and he became associated with the governmental organization Checkmate, a role revealed when the character played a small but important role in the 2007-2008 limited series comic book "52 Aftermath: The Four Horsemen".  The character made major appearances in "Final Crisis: Resist" in December 2008 and "Justice League of America 80-Page Giant" in November 2009.

Comics artist: A comics artist (also comic book artist or graphic novel artist, comic book producer, comic book illustrator, comic book writer, and comic book author) is a person working within the comics medium on comic strips, comic books, or graphic novels.  The term may refer to any number of artists who contribute to produce a work in the comics form, from those who oversee all aspects of the work to those who contribute only a part.

Amazing-Man (Centaur Publications): Amazing-Man (John Aman) is a fictional, American comic book superhero whose adventures were published by Centaur Publications during the 1930s to 1940s in the Golden Age of Comic Books.  Historians credit his creation variously to writer-artist Bill Everett or to Everett together with Centaur art director Lloyd Jacquet.  Amazing-Man first appeared in "Amazing-Man Comics" #5 (Sept. 1939)

Supporting paragraphs: Stinz Donna Barr
Answer: Steinheld Löwhard