Umm... no that's not what it meant. It's from the old french and meant unmarried or chaste girl.
I'm sorry. What? If you want to make up your own history don't call it common sense. If you want to know what the word originally meant, then etymology is what you require.
'potent' is your own construction - it's not in the word or its origins. You can't just take a meaning like 'marriageable' and create associations and imply that's what the word meant. It emerged from Latin, where it already had been clearly defined.
Well, I like the idea.