She's brown and fat, she must be....

SAMOAN.
I'm an unusual mix - half Filipino, the other a half a mix of Spanish, Native American and Welsh. It confuses people. Strangers have always always asked me ,"What are you?". There's usually some type of office pool when I start a new job. It's disconcerting.
When I was young and skinny, I confounded people. Maybe I was Filipino, but I was too tall (5'7" - yes, I know, not that tall, but as a Filipino woman (Filipina) that is almost Giant status - my mom topped out at 4'11" and a half). Possibly Latina or Hawaiian, something different. I was stopped in bathrooms, malls, people would stare at me.
Now I'm a bit older and a lot fatter. I still get Latina and Hawaiian, now I get Samoan. Samoan? Why Samoan? Because I have brown skin and eyes, black hair and I'm fat? I get it all the time. So I googled Samoan people and then Samoan women. They seem to have the same ratio of skinny and fat people as other ethinicities.
Any explanations?