Well, unless they flew in, they had to have been somewhere besides Texas before they got to Texas.
Of course, and the way we derive origination is through condiments. Sure, all Texans were stuck eating deer and boar and bear and carp, but it's what they sauced it with is our clue.
Soy sauce packets? Bering Strait. Vinegar? England. Salsa? Chichenitza, and so on.