Carlton Kennish

Carlton Summers-Kennish is the biological son of Toby Kennish and Lily Summers, the grandson of Kathryn Kennish and John Kennish, the biological nephew of Daphne Vasquez and the legal nephew of Bay Kennish

Season Four
Lily became pregnant after she and Toby broke up but nothing happened as she said that many many many many many times to Toby. After a call from her doctor asking her to get tested because of her brother, Lily discovers that Carlton has Down Syndrome. Toby and Lily decide to keep the baby and later find out that he is a boy. This revealed some feelings that the expected parents were keeping from each other. In the Season 4 finale, shortly after Carlton was born, the Kennish and Vasquez family crowds him. John and Kathryn reconcile. Bay asks what the baby's name is and Toby and Lily reveal that his name is Carlton. They chose Carlton because it is the place where they met and became friends.

Season Five
One-year-old Carlton comes from London, England, with his parents to visit his paternal grandparents and younger sisters. Lily takes him upstairs for a nap in Bay's old bedroom.