What is the surname of the family living in Emily's old farmhouse?

The family living in Emily’s old farmhouse has the surname Manoukian.

Emily’s former home reappears in Toy Story 5 as the farmhouse where Jessie once lived with her original owner. After Jessie and Bullseye are separated from Bonnie during the sleepover trip, they are eventually sent back to the property. The current residents are the Manoukians, linking Jessie’s present-day adventure to the painful history revealed in Toy Story 2.

Emily’s abandonment of Jessie is one of the franchise’s most emotional flashbacks. Jessie remembers being left behind after Emily outgrew her, which explains her fear of being forgotten and her determination to remain useful to Bonnie. The farmhouse therefore functions as more than a setting: it brings Jessie face to face with the place associated with her earliest loss.

Manoukian is the family surname, while Blaze is the name of a member of the household—not the surname. Phillips, Davis, and Anderson are not the family name identified in the film.