c. 1400, from Anglo-French testatour (c. 1300), from Late Latin testator "one who makes a will," from testari (see testate). Fem. form testatrix is attested from 1590s.
Entries linking to testator
testate adj.
"having left a valid will," late 15c., from Latin testatus "public, manifest, published," past participle of testari "make a will, be witness to, declare" (see testament).