To add-on further:
To understand aspects of the Pert, is to also understand aspects of daily Kemetic life.
For "Ani" to have been a historical person, to have written this tremendously invaluable text, would have meant that his life would have been well-documented, according to Kemetic tradition.
This has always been the case with Kemet's exceptional scribes, the likes of
PTAH-HOTEP
http://en.wikipedia.org/wiki/Ptah-hotep
Ptahhotep, sometimes known as Ptahhotpe or Ptah-Hotep, is the name of a 24th century BC vizier and philosopher. He was vizier to Djedkare Isesi in the Fifth dynasty of Egypt. He is known as the (supposed) author of a series of wise sayings known as The Maxims of Ptahhotep, assembled ca. 2350 BC. A manuscript copy, the Prisse Papyrus, is on display at the Louvre. They are intended as advice and instructions from a father to his son.
His tomb is located in a mastaba in North Saqqara.
He had a son named Ankhu, also a vizier[1].
AMENEMOPE
http://en.wikipedia.org/wiki/Amenemope
Amenemope (ca. 1100 BC) was a "wise man" who lived in Egypt. He lived in Akhim, which was located on the east side of the upper delta of the Nile. His discourses resembled that of a father telling his son how to live the good life. Although his discourses are unique, they share common themes with other wisdom literature of other cultures surrounding Egypt (Babylonian, and Hebrew, i.e., Proverbs and Ecclesiastes).
The same can be said for other Kemetic writers, such as KHONSU-HOTEP....However nothing concrete is found about ANI.
Also, within the pages of the PERT, ANI's name is transliterated with the deities that "he" then becomes.
OSIRUS-ANI (or ANUK AUSAR; "I am the living Lord" ), THOTH-ANI (ANUT TEHUTI; "I am the embodiment of wisdom"), etc.
Thus, ANI becomes that which the name has always implied; the embodiment of the Divine.
PEACE