What legal term refers to a beneficiary of a testamentary trust?

The term that refers to a beneficiary of a testamentary trust is "beneficiary." In the context of trusts, a beneficiary is an individual or entity entitled to receive benefits from the trust, which is established according to the terms outlined in a will after the testator (the individual who created the will) passes away.

A testamentary trust is specifically created to take effect upon the death of the testator, and the beneficiaries are those who will benefit from the assets placed in the trust as designated by the testator. The roles of the other terms mentioned provide additional context. The testator is the individual who makes the will, the grantor is often a broader term that can refer to someone who creates a trust, and the trustor is synonymous with grantor in some contexts but is less commonly used. In each case, only the term "beneficiary" accurately represents the person or entity that stands to benefit from the testamentary trust.