My favorite food is tex mex. Tejanos sure know how to create spicy food.
same here, Is Tejanos a restaurant?
No, tejanos are spanish speaking settlers that live in the state of Texas.
so tejanos settlers were the ones who originated tex-mex food
Yes, and it's mostly popular in Texas.
okay now i get it. than tex-mex is a combination of mexican food and texan food
Exactly, some common ingredients that are used in the Tex-Mex dishes are shredded cheese, meat, peppers, and spices.
do they have specific names for the dishes?
addition to flour tortillas. Dishes such as Texas-style chili con carne, nachos, crispy tacos, and fajitas, are all Tex-Mex inventions. 
Generally cheese plays a much bigger role in Tex-Mex food than in mainstream Mexican cuisine, particularly in the popularity of Chile con queso (often referred to as simply "queso") which is often eaten with chips (alongside or in place of guacamole and salsa), or may be served over enchiladas, tamales or burritos.
Moreover, Tex-
Tex-Mex (disambiguation)
Tex-Mex is a regional American cuisine that blends food products available in the United States and the culinary creations of Mexican-Americans influenced by the cuisines of Mexico.
Tex Mex may also refer to:
- Tejanos, a name for residents of the state of Texas culturally descended from the settlers of Texas and northern Mexico
- Tex-Mex music, another name for Tejano music, folk and popular music originating among the Mexican-American populations of Central and Southern Texas