A note with the July 5 photograph said "Sayuri's birthday yesterday." Sayuri Sak, 7, died early Thursday with her parents, Torn Sak and Ellen Vuong, and two brothers, Anthony, 12, and Ryan, 8.
The three-alarm fire killed two other adults living in the building, one of them identified by relatives as Tina Christakos.
State Fire Marshall Stephen Coan said the cause of the fire has not been determined, although it is not believed to have been deliberately set.
The fire swept quickly through the three-story wood-frame building, which had businesses on the ground floor and apartments above. Coan said it took more lives than any fire in the state in 20 years.
Fire department records showed that an alarm went off in the building July 3 because of a child setting off firecrackers.