'Princely' in the Bible

For a Child hath been born to us, A Son hath been given to us, And the princely power is on his shoulder, And He doth call his name Wonderful, Counsellor, Mighty God, Father of Eternity, Prince of Peace.

To the increase of the princely power, And of peace, there is no end, On the throne of David, and on his kingdom, To establish it, and to support it, In judgment and in righteousness, Henceforth, even unto the age, The zeal of Jehovah of Hosts doth this.