I think you mean Nubian roughly equivalent to Kush. However, the 25th dynasty was a line of pharaohs who originated in the Kingdom of Kush, located in present-day northern Sudan and Upper Egypt. Most of this dynasty’s kings saw Napata as their spiritual homeland. They reigned in part or all of Ancient Egypt from 747–656 BC. The Twenty-sixth Dynasty of Egypt (notated Dynasty XXVI, alternatively 26th Dynasty or Dynasty 26) dynasty was the last native dynasty to rule Egypt before the Persian conquest in 525 BC. Total number of Egyptian dynasties was I think 31. Plus, two Greek ruling dynasties, the last one the Ptolemaic and the last of that line was Cleopatra.
I actually know all about the Kush and have a couple of books about them and their brief ( in terms of how short lived it was ) their rule in Egypt.
The Ptolemaic rule ran three times as long. Cleopatra VII was the last of that line.