Isabella's baby was the son of Isabella Hudson and Marcus Hudson, and he was a survivor of the Route 23 pile-up. Not much is known about him, except the nurse had mentioned that he was a boy, as he only had one on-screen appearance. It's unknown whatever his surname was still as same as his father, since Isabella had broke up with him when she was pregnant, so it's possible that Isabella named her baby with her maiden name, which is unknown.