Ishiah: One of the Heads of Issachar
Source: Nav
1 Chronicles 7:3
The son of Uzzi: Izrahiah. The sons of Izrahiah: Michael, Obadiah, Joel, and Isshiah. All five of them were chiefs.
1 Chronicles 24:21, 25
As for Rehabiah, from his sons: The first was Isshiah. / The brother of Micah: Isshiah; from the sons of Isshiah: Zechariah.