Noah Webster's Dictionary (n.) A man who makes and leaves a will, or testament, at death.

Multi-Version Concordance Testator (2 Occurrences) Hebrews 9:16 For where a testament is, there must also of necessity be the death of the testator. (KJV DBY WBS) Hebrews 9:17 For a testament is of force after men are dead: otherwise it is of no strength at all while the testator liveth. (KJV DBY WBS)