Malcolm Cutler

The name Ezra and Maggie's 4 year old child is Malcolm. Few things are still known about the baby. It's unknown if the baby will make an appearance in the show. It is possible that the baby looks exactly like Ezra but it is also possible that the baby could look nothing like Ezra and look like Maggie.

Season 3
Ezra and Maggie's baby was first mentioned in "The Kahn Game". Wesley said that his mom "made sure she took care of it", which might mean Maggie got an abortion and the baby is dead.

The baby's mother, Maggie will make an appearance in mid-season finale, "The Lady Killer", so we might find out more about the baby. Its still alive.