Answer by taking a quote from the following article:

Betty Boop is an animated cartoon character created by Max Fleischer, with help from animators including Grim Natwick. She originally appeared in the Talkartoon and Betty Boop film series, which were produced by Fleischer Studios and released by Paramount Pictures. She has also been featured in comic strips and mass merchandising. A caricature of a Jazz Age flapper, Betty Boop was described in a 1934 court case as: "combin[ing] in appearance the childish with the sophisticated--a large round baby face with big eyes and a nose like a button, framed in a somewhat careful coiffure, with a very small body of which perhaps the leading characteristic is the most self-confident little bust imaginable".

Betty Boop made her first appearance on August 9, 1930, in the cartoon Dizzy Dishes, the seventh installment in Fleischer's Talkartoon series. Although Clara Bow is often given as being the model for Boop, she actually began as a caricature of singer Helen Kane. The character was originally created as an anthropomorphic French poodle. Betty Boop appeared as a supporting character in ten cartoons as a flapper girl with more heart than brains. In individual cartoons, she was called "Nancy Lee" or "Nan McGrew"--derived from the 1930 Helen Kane film Dangerous Nan McGrew--usually serving as a girlfriend to studio star, Bimbo.  Within a year, Betty made the transition from an incidental human-canine breed to a completely human female character. While much credit has been given to Grim Natwick for her creation, her transformation into the cute cartoon girl was due to the work of Berny Wolf, Otto Feuer, Seymour Kneitel, "Doc" Crandall, Willard Bowsky, and James "Shamus" Culhane. By the release of Any Rags Betty Boop was forever established as a human character. Her floppy poodle ears became hoop earrings, and her black poodle nose became a girl's button-like nose.  Betty's voice was first performed by Margie Hines, and was later performed by several different voice actresses, including Kate Wright, Bonnie Poe, Ann Rothschild (also known as Little Ann Little), and most notably, Mae Questel. Questel, who began voicing Betty Boop in Bimbo's Silly Scandals (1931), and continued with the role until 1938, returning 50 years later in Disney's Who Framed Roger Rabbit. Today, Betty is voiced by Tress MacNeille, Sandy Fox and Cindy Robinson in commercials.  Although it has been assumed that Betty's first name was established in the 1931 Screen Songs cartoon, Betty Co-ed, this "Betty" is an entirely different character. Even though the song may have led to Betty's eventual christening, any reference to Betty Co-ed as a Betty Boop vehicle is incorrect although the official Betty Boop website describes the titular character as a "prototype" of Betty. There are at least 12 Screen Songs cartoons that featured Betty Boop or a similar character. Betty appeared in the first "Color Classic" cartoon Poor Cinderella, her only theatrical color appearance in 1934. In the film, she was depicted with red hair as opposed to her typical black hair. Betty also made a cameo appearance in the feature film Who Framed Roger Rabbit (1988), in which she appeared in her traditional black and white and was voiced by Mae Questel.  Betty Boop was the star of the Talkartoons by 1932 and was given her own series that same year, beginning with Stopping the Show. From that point on, she was crowned "The Queen of the Animated Screen". The series was popular throughout the 1930s, lasting until 1939.

Where we trace betty's origin?
Betty Boop made her first appearance on August 9, 1930, in the cartoon Dizzy Dishes,