Is there a reason some people call this 기정떡 and others call it 가람떡?

This is my favorite rice cake~ I was originally taught 기정떡, and in my town there are a few rice cake shops with that name. But a lot of my friends have never heard of that term before, and call it 가람떡. I was curious if it's just a regional difference, like putting sugar or salt in 콩국수 (I'm also curious about how that came about as well actually), or if both are used interchangeably.