It's a Shame about Mephiboshet

One of Shaul’s descendants who was hanged by the Givonim was named Mephiboshet, yet earlier in the book (but later in time) David found Mephiboshet, son of Yonatan (Jonathan,) and took him into his court.  Apparently there were two Mephiboshets.  Incidentally, according to Divrei Yamim (The Book of Chronicles) the suffix “Boshet” was originally “Baal,” the Canaanite idol.  The prophetic authors of the text did a find-replace and switched, “Baal,” idol, with, “Boshet,” shame.  Shaul’s descendants seem to have fallen into shame in that they were naming their children after idols.