Final answer:
In 'The Office' episode 'The Delivery,' Jim and Pam name their baby girl Cecelia Marie Halpert.
Step-by-step explanation:
In the sitcom 'The Office,' Jim and Pam name their baby girl Cecelia Marie Halpert. In the episode 'The Delivery' (S6E16), Jim and Pam go through the labor and delivery process, and their daughter is born. They choose the name Cecelia Marie for their baby girl.