Kings I ch. 7 tells of Solomon enlisting a Tyrian smith named חירם, Hiram to fashion many implements that were used in the Temple.
Chronicles II ch. 2 speaks of the King of Tyre sending a smith named חורם, Huram.
Huram is said in ch. 4 to have made basically the same things that Hiram made in Kings. This strongly implies that they were the same person.
Why do the verses name this man חירם in one place and חורם in the other?