The youngster was a backseat passenger in a Ford Focus car driven by Monika, which was in a collision with an Iveco lorry on the A92 north of the Redhous Roundabout.
A nine-year-old boy, also sitting in the back of the car, sustained serious facial injuries.
The 36-year-old male front passenger was unhurt, as was the lorry driver.
The families of Bartek and Monika released a statement through Police Scotland paying tribute to their loved ones.
Bartek’s family said: “Bartek was a much loved and treasured son and brother.
“He was a very popular boy who touched the hearts of many and will be sadly missed by everyone who knew and cared for him. The family are requesting privacy at this most difficult time.”
Monika’s family said: “Monika was a loving wife, mother, sister and daughter who was much loved and will be sadly missed by all who knew and cared for her.”
Police are continuing their inquiries into this collision and anyone with information is asked to come forward.
Inspector Brenda Sinclair from the Road Policing Unit said: “Once again, our sympathies are with the families of Bartek and Monika and we will continue to provide them with all the necessary support and they assistance they require.
“Fife Road Policing Unit has been conducting a thorough investigation into the full circumstances surrounding this tragic incident and we remain keen to speak to any motorists who were on the A92 at around 2.55pm on Monday and witnessed the collision.
“In addition, anyone with any further information that can assist with our inquiries should also get in touch.”