Did he have any kids before or after marrying Tar-Miriel? Considering how old he was when he stole the scepter from Tar-Miriel, is there an off chance he could have had kids?
No known offspring.
No mention is made in The Silmarillion or Tolkien's other writings of any children of Ar-Pharazon and Tar-Miriel, and family trees show no descendants:
(this picture taken from here)