This is the third item in the list. It can be written with the verb "were." Alternate translation: "The leaders of the descendants of David were Hattush who was ... Parosh; and Zechariah" or "The leaders of the descendants of David were Hattush and Zechariah. Hattush was from ... Parosh"
This is the first of two parts of the third item on the list. can be written as a separate sentence after "Zechariah." Alternate translation: "Hatush was a descendant of Shecaniah, who was a descendant of Parosh"