Genealogical records often hold hidden identities, using alternative names for well-known historical figures. Deep within the family lines of Israel's early kings, Jonathan's son is listed under the name Merib-baal. The commentators agree that this individual is actually Mephibosheth, a familiar figure from the Book of Samuel.
This connection becomes clear when examining the historical accounts of Saul's royal family. The historical records indicate that Mephibosheth was the sole surviving heir from the house of Saul [רלב״ג]. Therefore, the son of Jonathan listed in the genealogy must be him. A further detail confirms this shared identity. The family records note that Merib-baal fathered a son named Micah. This perfectly matches the historical account of Mephibosheth, who is also recorded as having a son named Micah [רד״ק].