Kia.
audi
Automobile Dacia is a Romanian car manufacturer
Assuming by brand you mean make i.e. chevrolet, ford, pontiac. No there is no "brand" that starts with x. However if you meant brand as in model, yes there is. the Nissan Xterra.
MINI
Mulbury
Wrangler
yes there is
Lamborgini.
Isuzu
commodore
audi
Kia.
Certain car: Odyssey. NOT made by this company Brand: Oakland
kia (its a car brand)
dodge
Rolls Royce