Testamentrix

[…]make nominat and conſtitute the ſaid W. my Spouſe to be ſole Tutrix & Teſtamentrix during her Widowity allennerly to my ſaid Daughter, for guiding and governing her perſon and Eſtate during her Pupillarity, and failing of her by Marriage or Death, I nominat and appoint F. G. H. I. K. and L. or any three of them who ſhall accept, the ſaid F. alwiſe being one during his Lifetime to be her Tutors as ſaid is.

Source: wiktionary

With regard to what form must be gone through in the making of a will, the will must be in writing and signed at the end thereof by the testamentrix in the presence of two or more competent witnesses.

Source: wiktionary

The testamentrix leaves all of which she may die possessed to her husband, Isaac Parker, and to Mrs. Ada Hosmer Banks, share and share alike.

Source: wiktionary

“On April 23, 1616, Miguel de Cervantes Saavedra died, married to Doña Catalina Salazar, Leon street: he received the sacraments from the Licentiate Francisco Lopez; he asked that he be buried in [the convent of] the Trinitarian nuns; he ordered two requiem masses said and the rest at the will of his wife, who is testamentrix, and the Licentiate Francisco Nuñez who lives there.”

Source: wiktionary