Adam Clarke on 1 Kings 5:1

Hiram king of Tyre - It must have been at the beginning of Solomon's reign that these ambassadors were sent; and some suppose that the Hiram mentioned here is different from him who was the friend of David; but there seems no very solid reason for this supposition. As Hiram had intimate alliance with David, and built his palace, 2Sam 5:11, he wished to maintain the same good understanding with his son, of whose wisdom he had no doubt heard the most advantageous accounts; and he loved the son because he always loved the father, for Hiram was ever a lover of David.