Tex. Est. Code § 308.001
In this subchapter, "beneficiary" means a person, entity, state, governmental agency of the state, charitable organization, or trustee of a trust entitled to receive property under the terms of a decedent's will, to be determined for purposes of this subchapter with the assumption that each person who is alive on the date of the decedent's death survives any period required to receive the bequest as specified by the terms of the will. The term does not include a person, entity, state, governmental agency of the state, charitable organization, or trustee of a trust that would be entitled to receive property under the terms of a decedent's will on the occurrence of a contingency that has not occurred as of the date of the decedent's death.
Tex. Estates § 308.001