I have a simple non-descrip 12 quart (no legs) cast iron dutch oven that my mom received from her aunt "many" years ago. The aunt used it to make her Jambalaya for many years before she gave it to mom. My mom used it for many years to make her Jambalaya as I was growing up. Then it got too heavy for mom, so she gave it to me some 15 years ago, and that is what I use to make a small Jambalaya (ten people or less).
I have a 10 gallon Cast Iron Jambalaya pot for the real Jambalaya Cooks.