Before she married Barney Rubble, Betty's full given name is Betty Jean McBricker. She and Wilma grew up to be best friends as well as Barney and Fred. They met Fred Flintstone and Barney Rubble when they worked as Cigarette Girls at a resort as young women. She and Barney had more an emotional marriage than the Flintstones.

Betty and Barney wished on a falling star for a baby. The next morning, she and Barney had found a very strong baby boy on their doorstep in Bedrock. They named him Bamm-Bamm Rubble and officially adopted him after a court battle. Betty got her wish, a healthy and very STRONG baby boy.

Fun Fact - Betty worked as a reporter at the Daily Granite when Bamm-Bamm was a teenager. After Bamm-Bamm and Pebbles married and had twins, she and Wilma started a catering business.

More Info: en.wikipedia.org