Arthur R. Momand was an artist and creator of the comic strip ''Keeping Up With the Joneses'. Mr. Momand, who was born in San Diego, attended the Trinity School in New York City and began his career as a sketch artist for The New York World in 1907. In 1916, he created ''Keeping Up With the Joneses,'' a comic strip parody of American domestic life, which was eventually syndicated in several hundred newspapers in the United States and abroad. After discontinuing the comic strip in 1945, Mr. Momand, who was known as ''Pop,'' worked as a portrait painter in Manhattan.