Saku is a Finnish male given name. By the end of 2019, it had been given to 4,524 men and a few women.

Saku is a common diminutive of names such as Sakari, Sakarias, Zacharias, and Sakke. It was officially added to the Finnish almanac as a given name in 1973. The name days for Sakari and Saku are celebrated on January 14th, in honor of Zachris Topelius’s birthday, on which date these names have been placed. The earlier spelling was “Zacharias.” The name’s origins are rooted in the Hebrew language, meaning “Yahweh has remembered.”

Sakkeus is also of Hebrew origin and signifies “righteous.”