Alexa-Marie died in hospital after police were called to the family home in Queen Bee Court, Hatfield, at 9.30pm on Wednesday.
In a statement released through police, Alexa-Marie's family paid tribute to the youngster:
We are completed stunned and devastated that our beautiful little girl has been taken from us so suddenly.
She was truly the most gentle, loving, happy and amazing little soul we had the pleasure of knowing. We would be asked to be left alone to grieve at this traumatic time.
More top news
Motorists who cause death by speeding, street racing or while on a mobile phone are among those who could be handed tougher punishments.
Cubans have lined the streets since Thursday as the ashes of the Communist leader were driven on a 600-mile journey across the island.
It is alleged Mourinho was helped by his advisers to avoid paying tax on earnings from the use of his image rights for product endorsement.