What is the Last name of blond female comedian in 1960s was either JB or BJ?

The comedian you're referring to is likely Joan BlonDELL, though she was more prominent in earlier decades. If you're specifically looking for a comedian with initials JB or BJ from the 1960s, it may be a bit tricky, as many female comedians from that era had different styles and personas. If you have more context or details, that might help narrow it down further.