It means 'what is the nickname of your last child?'
a nickname
"Enfant" translates as "child".
"Fernier" is not a word. Do you mean "dernier"? The word "dernier" means "last". For example "le mois dernier" = "last month"
Il est enfant unique
"un enfant placé" is a child in foster care
'votre' is the possessive translated by 'your' in English.
"un enfant placé" is a child in foster care
I am a child (it should be - un enfant)
Deuxième prénom de mon premier enfant mean
Un enfant parfait (masc.), une enfant parfaite (fem.) means "a perfect child" in French.
Un enfant terrible is a troublesome child. Being an 'enfant terrible' is being someone special by his breakneck or foolish behaviour: Michael Jackson was the 'enfant terrible' of the soul music.
"votre jolie ..." means "your pretty ..." (fem. noun).