Ahmose-ankh was a crown prince during the reign of Ahmose I (r. 1570-1546 BC high chronology) in the early Eighteenth dynasty of Egypt.
He was the crown prince but pre-deceased his father, thus the next pharaoh was his younger brother Amenhotep I.
As his father ascended the throne at the age of 10, Ahmose-ankh must have been born well into the reign.
Secondly, he seems to have died at the second part of his fathers reign which lasted 25 years.
A stela which depicts him with his parents (Luxor Museum).