Well, since we’re at it, drama and llama rhyme with one another, and mama and comma don’t rhyme with one another, for this Canadian. 
This
Mamma, I’ve never seen, but if I did it would be like mammy only drop the y and and an a.
It was Mummy for the first few years of childhood, until it was Mum for us, in New Zealand. And still is.
But if I write Mama, it’s… well, it’s Mama.
I call her Mom or Mommy, so if I write it out, it’s Momma.
However, when I call her on the phone, I say “Hey, what’s up Mamacita?”
We’re both from Kentucky and about as latino as…mac n cheese?
Usually I call mine “mother” but if you are asking spelling from the choices given, its “Mama”.
Whenever I see “Mamma Mia” posters, my mind translates it as “my mammaries”. Or some approximation thereof. I’ve never seen it spelled “mamma” anywhere else.
It’s spelled ‘mama’ in the lyrics to Bohemian Rhapsody on Queen’s official website. I don’t know what more authoritative cite one could ask for.
Mama for me. It looks better. Isn’t “Mamma” the Italian way? I don’t like their “caffe” spelling, either. Mell Lazarus spelled it “Momma”, but then he also spelled “Mel” with two L’s.
I’m from NYC, and for me, mama, llama, drama, and comma rhyme mutually, reciprocally, and with each other. Alabama doesn’t, though, and neither does gamma.
But gamma does rhyme with Alabama. 
Same here, Chicago. The vowel in “mom” is the same as in “llama” and “comma,” and I live in a dialect without the caught/cot merger that often causes confusion. I assume the vowel in question is like a British “o”?
Well, if we’re getting into nicknames, I called my mom Mome, Momey or Momalome, and she called me Honus or Honus Bolonus 
I spell it Mama but I pronounce it Mama. That is to say I don’t pronounce it MaaMaa like Americans seem to do. It’s really almost Muh-Ma.
I also say Papa the same way. Sometimes I call my dad Dad but mostly it’s still Papa.
Mama doesn’t rhyme with drama to me, but drama rhymes with llama for sure. Comma is another, different pronunciation.
My pronunciation is still mostly flatlander, where I spent my formative years (Michigan).
I’m surprised. I would have assumed that Mama vs Momma would be about even, and Mamma would be right out, since it would be pronounced like Mammy.
I assume people who spell it Mama also use Papa–a word I find to be really uncommon, but I understand is popular in other parts of the country. I expected that people who use Dad or Pop would use Momma, since the short word is Mom. (I assume those who use Daddy say Mommy, and avoid the whole issue.)
I use Momma. Even though I have the appropriate merger, Mama just does not look right–it feels stuffy, like Papa does. And I could definitely see it being pronounced like Anamika does, with the accent on the last syllable. Like papá in Spanish or Papa in French.
[QUOTE=BigT]
I assume people who spell it Mama also use Papa–a word I find to be really uncommon
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I called my parents Mama and Daddy and so did at least half of the people I knew growing up in rural Alabama. It transcended socioeconomic class and race, which few things did at that time. Several transplanted people have commented over the years how funny it was to them hearing grown or even old people, some of them major league professionals or very rich, call their father Daddy. (IIRC Bobby and JR called their parents Mama and Daddy on Dallas.)
Many of us used Papa for one of our grandfathers. (Come to think of it, in all cases where Papa was used it was for the maternal grandfather; no idea if that’s significant or not.)
I’ve known people who called their father “Pop” but more as a nickname- usually they called him Dad or Daddy but would occasionally say “Hey pop”. I’ve known a few people who called their mother “Mother” (usually not a terribly warm relationship when they did that) but never anyone who called their father “Father”.
My father called his parents Muh and Dah which I understand is common in Ireland but he’s the only person I knew who did it here. I think it was just an individual thing with him; I called one of my grandmothers Meemaw growing up and while it’s not terribly uncommon nobody knows why I did that as none of her other grandchildren called her that. I called the other one “Grandmother”, as did my siblings, because she was not anybody’s notions of a Grandma or Granny.
Mama. But it doesn’t rhyme with drama.
As a kid in 3rd-4th grade having my first run-in with phonetics (using the old dictionary diacritical markups long before IPA) I first rebelled against the idea that the a sound from father is the same vowel sound as the o sound in bother or lock. But after a day or two experimenting with trying to say the other vowel in such words I came to agree that the only differences were psychological (having to do with how I thought of the respective vowels) and not auditory.
I can’t know how you other folks are pronouncing drama, llama, mama, and comma, but to me they’re all that same found, the a in father / o in lock sound.
[QUOTE=AHunter3]
I can’t know how you other folks are pronouncing drama, llama, mama, and comma, but to me they’re all that same found, the a in father / o in lock sound.
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Ditto. I hear the difference in mama and daddy of course, but the a’s in the above words all sound like “ah” to me.
Of course my German professor in college never could convince me of a difference between singer and finger, so, there’s that. (I don’t have a thick regional accent at all, btw; I’m usually told I have a generic newscaster voice.)
x2
My kids call me Mama. I call my mother “Mom”, but when my father is writing to me about my mother, he refers to her as “your momma”. (Which sounds like a joke.)
Mama, momma, drama, llama, and comma all rhyme. I don’t think I’ve ever seen Mamma, so I’m not sure how I’d pronounce it.
You probably say Mama like I do. Also Papa.