Oddly, all the Atlas/Marvel superheroes that were revived in 1953 happen to have girlfriends named Betty / Betsy. Someone must have loved that name – Stan Lee perhaps? Betty Wilson was introduced as a minor character for the Human Torch.
Betsy Ross (no relation to the Hulk’s Betsy Ross?) used to be Golden Girl, but now she’s just a “girl reporter” that follows Captain America around.
Betty Dean was Namor’s police-woman friend from way back.