I stumbled on a blog with that story a few weeks ago. The blog author said she got it from her friend who had the student in her class and the mother explained the name, complete with ghetto grammar. “The dash don’t be silent.”
Wouldn’t that be “La?a”
'course then “La*a” could have any number of characters filled in. 
Well, as this is one of those often quoted urban legend names that no one has actually seen, the answer is:
La Dasha
Me too . . . out of spite, and out of accuracy.
The people I know in the ghetto don’t speak that way. Oh, we use ‘be’ in the ‘wrong’ way all the time, but I have never heard it used that way. Perhaps that blogger should visit more ghettos.
I don’t buy it, I think it is FOAF.
Heck, I think I heard this rumor a year ago. I don’t believe it for a minute.
Dude, you’re late. Pay attention.
Seriously. “Be” is typically used to denote something that happens on a consistent basis. Instead of “She lies,” one would say, “She be lying.” Keep up, white people!
Just for the record, it’s spelled “en dash” and “em dash.”
Is anal-retentive hyphenated?
No, it’s got a colon.
:smack: I knew that, too.
We registered my daughter before we’d given her a first name so her birth certificate and first passport both say - Lastname. Sometimes we call her Dash.
I had a good snarky answer all ready, and Marley out-snarked me. Rats. I don’t have an answer better than his.