What is the name of the Jetsons' robot maid?

The Jetsons’ robot maid is named Rosie.

Rosie is the Jetson family’s robotic maid and housekeeper in Hanna-Barbera’s futuristic sitcom The Jetsons. She is usually shown wearing a frilly apron, moving on caster wheels, and using a separate vacuum cleaner while handling domestic chores in the family’s automated home.

Her character was introduced in the original series episode “Rosey the Robot,” which gives her model number as XB-500. The story describes her as an older demonstrator model hired from U-Rent a Maid, making her somewhat outdated compared with newer household technology. Her obsolescence becomes a recurring source of humor and sympathy.

The name is often written “Rosey” as well as “Rosie.” “Rosey” appears on some original episode title cards, while “Rosie the Robot” is the widely used modern spelling and the form recognized by the question. She is also sometimes confused with other famous fictional maids, but Rosie is the Jetsons’ household robot.