Cyrus. The son of Astyages and Esther. See App-57.
Darius: i.e. Darius Hystaspis (see App-57, App-58). "Darius" being only an appellative (= the maintainer), needs "Hystaspis" to be added, to identify him; as Astyages, when called Darius, needs the addition of "the Mede". See App-58, and notes on p. 618.