Growing up, we called them Anaheim chiles. Having close access to Hatch chiles, as well, we would buy those labeled as such.
Either way...they (both) make EXCELLENT chile rellenos...on a platter, served up next to a pan of homemade enchiladas! ¡Si Señor!
Trinity Hotel in Carlsbad uses them for their “green chile” cheeseburger. Thay also use a sweet bread bun that makes the whole thing !fabulous!.
Paired with the home grown valpolicella and you have a meal!