This has my vote!
The Biscuit Chisel
Yeah, I like that name, as well. Local connection. Not punny or overly clever (sorry, I don’t like overly clever restaurant names. Save that for the hairdressers.) Straightforward. Memorable. I vote this.
The Fluffy Biscuit
Biscuits And More
The Biscuit And Gravy Train
Fresh Hot Biscuits
On this point, did her university fans know her by name? Or was “Ma” a nickname for her there? It seems to me you have an initial built-in customer base of former students if you make it obvious who is making the biscuits.
Something easy to remember:
That Breakfast Place (Hey, let’s go to that breakfast place.)
I rather like the name of the restaurant that the Clampetts ran briefly on The Beverly Hillbillies: The Happy Gizzard Will make people say WTF and come check it out.
Other options:
There’s No Biscuits Like Home Biscuits
That Breakfast Place
Mister Biscuit
Biscuit Masters
People Biscuits
Smothered n Covered
The Wicked Biscuit
Ma’s lil Biscuit
Ma’s Wicker Biscuit Basket
The Piehole Plug
“the B”
This would be distinctive, memorable, repeatable (we’re going to the B!). B could mean biscuit, or B could mean breakfast, or B could mean both (that’s your advertising copy…). With the lower case “the” it has graphic logo options. The large B could be a distinctive typeface, or artistically rendered.
Only what’s been hinted. 
The Dusty Biscuit 
This is a red flag for a restaurant. The technique has to be repeatable by other staff. What happens if Ma gets sick or goes on vacation?
I like really simple names for restaurants. There’s one near-ish here just called “Home.”
So:
Biscuit
Gravy
Butter
Home
Kitchen
I like limited concept restaurants, but not limited concept names.
You got ninja’d by 3 minutes. 
If “biscuit” doesn’t have to be in the name, I second Sunny Side Up. It reminds me of waking up on the right side of the bed - which a good breakfast place can make you do.
For the whole tired college student side of things, how about Biscuits and Books? Although that might make people think you’re a bookstore . . .
Or, go for something simple: The Biscuit.
Morning Side Up
Are you gonna serve waffles too? If so, a recent episode of Maron gave me a great idea for a restaurant name.
Returning to answer a bunch of stuff, in no particular order - pardon me if I missed any, recovering from a migraine.
Ma’s given name is Nancy. Half of the world calls her Ma or Aunt Nancy.
No waffles - that would slow service down, I think, if you have more than two or three orders in a row.
At least three people know the “secret” to Ma’s biscuits. No worries there. Seriously, it’s three ingredients - it’s all in the technique.
I’m not telling any of Ma’s other secrets, but what you’ve heard on the streets may or may not be accurate!
Re: speed of service - we’re looking at approximately 78 service hours per week, plus prep time and opening/closing time (cleaning, paperwork.) I think that will be manageable with our current opening staff until we have a better idea of our traffic patterns, cash flow, etc. (and we have two backups - my brother and a nephew - in case of emergency.) If we ultimately find a location with a drive-thru window, we’ll hire more staff prior to opening, though, because there’s no reasonable way to run three lines with the current tentative staff, unless no one ever has a day off. Fortunately, Ma and I have the same philosophy for hiring customer service staff: we can teach you how to put together a biscuit, we can fix a paperwork snafu, but we hire the person with the right personality, because it’s a lot harder to go back and “fix” it when a staff member is unpleasant to the customer. (And we have no problem “firing” a customer if that becomes necessary. I’d rather send that difficult person to the competitor than spend 80% of my time dealing with someone who just refuses to adhere to his end of the social contract. If there’s a genuine problem, we’ll apologize and do everything we can to fix it, but if you’re just determined to be unsatisfied? Go get your biscuit at McDonald’s, please.)
As for business names - we can’t use Sunny Side Up or the Breakfast Club. Both of those are taken. I’m leaning more and more toward Wake Up Mama’s - it has a local connection, it’s not cutesy or punny, but it has a clever connection; it doesn’t tie us to one particular food product; and we can expand on the theme - blues music on the radio, decor can include vintage photos of the town, the university, sports memorabilia, or blues musicians. (Or southern rock, if we decide to go with the Allman Brothers connection vs. the blues connection. But I’d prefer blues.)
Ding ding! You can make biscuits out of most any fat/flour/dairy combination (along with the usual baking powder, etc.), but if you you don’t keep the fat cold, and you don’t know what it’s supposed to look like when properly mixed (shaggy), and you don’t cut them properly, you’ll have an inferior end result. Since you’re in the South, I’m assuming you use White Lily? I order it on line just for biscuit and pancake making. King Arthur also makes a high gluten/protein flour.
Rise and Shine
Rise
TLB - Tender Lovin’ Biscuit
The Rolling Pin
Gravy Train
Buttermilk
Rise Up
Eat at Ma’s
450° (or whatever temp you bake your biscuits at)
Ma-Kdonalds.