héritier

 n.  heir, heirdom, inheritor  detail>>

prince héritier

 n.  crown prince, male heir apparent to the throne  detail>>

héritier légitime

 n.  rightful heir, person who is lawfully the inheritor  detail>>

héritier présomptif

 n.  heir apparent, heir whose right to receive an inheritance cannot be changed by the bi...  detail>>

héritier du trône

 n.  heir to the throne  detail>>