Kelly and Duke
See the Wikipedia article
The 1970s comic strip featuring Dukethe Baltimore chicken hound is "B.C." by Johnny Hart. He was a humorous and mischievous character who often interacted with the other prehistoric characters in the strip.
Featured in the Popeye comic strip in 1936.
Buster Brown was featured in the comic strip Buster Brown. This comic was created by Richard F Outcault in 1902. This comic followed the adventures of Buster Brown, his dog Tige and his sweetheart Mary Jane.
Snoopy
Like 3 or so
Garfield
Comic Cuts was created in 1890 and is considered to be the world's first comic book. It was a British comic paper that featured a combination of text and illustrations, setting the stage for the modern comic book industry.
The Girls' Crystal comic started in 1940 and ended in 1963. It featured various adventure stories and was a popular girls' comic during that time.
Tiger
DC Comics
The comic strip "Johnny English" debuted in January 2003 as a tie-in with the film of the same name. It was featured in newspapers and comic magazines.
Fantastic Forum - 2007 2012 Baltimore Comic Con 4-3 was released on: USA: 25 January 2013
The Numbskulls featured in the Beezer, a UK comic in the 1970's