The meaning of the name Roberta is "bright fame."
It's also the title of Jerome Kern's 1933 musical -- known for the song "Smoke Gets In Your Eyes" -- later made into a movie with Fred Astaire, Irene Dunne, and Ginger Rogers
Roberta was also the robotic secretary for the Fab 4 (in comic strips).
Roberta Flack killed a bunch of people softly.
Billy Joel also wrote a song about a prostitute named Roberta.
There even was a band in DC called "Fat Roberta"
I call "Roberta" the international Fat Girl name because one too many times I'd watch a tv show or a movie and the fat girl (or the crazy girl) would be named Roberta. She was the butt of the joke.
If you pronounce it with a hard American accent you get Ro-burr-duh. It sounds heavy. (It get sexier if you add a little roll Rrrrobearta.)
Sometime in middle school I had an aversion to my name as well as its many splendid nicknames such as Bert or (Big) Bertha. Bertie and Bobbie were mildy annoying. More annoying was when people would call me Rebecca, Robin, or Rob/Bob.
It wasn't until college when I was dating D, and he came up with the nickname Robby (after I added a "Mr" in front of his name because he was a bit older than I was). We decided then and there that it would be Robby, with a "y" not an "ie." One person is allowed to call me Bert, by special waiver. My father even apologizes when he calls me Roberta.
I'm not the fat, frumpy, sometimes-crazy Roberta as tv/movies/lifetime specials would want me to believe, but a Robby of her own making. I still sign my name Roberta, but that's because legally it is still my name.
Everyone at work calls me Robby. I introduce myself as Robby.
It's who I've been ever since that first utterance of "yeah, that sounds like me."