Someone from Texas is a Texan.
No, a person from Idaho is an Idahoan.
Lyndon John son was the first Texan President, born , raised, and buried in Texas. Dwight D. Eisenhower was born in Texas but could hardly be called a Texan since he and his family moved to Kansas when he was one and he never again lived in Texas.
Texan is the adjective for Texas.
Arkansas Kansas Illinois Massachusetts Texas
Yes or even Tex or if Hispanic perhaps Tejano would be preferred.
A Texas resident is a Texan .
Texan "He once crossed the Texan prairies on horseback."