"Dead king" in English translates to "mortuus rex rgis" in Latin.
Latin's a dead language. You don't say anything in it.
You say 'Tuus rex est.'
rex regum
Rex Iudaeorum
Honoris ille Mors
dulce mors
Caesar mortuus est.
Filia regis is daughter of a king
It is spelt Sapientia. This is the feminine noun. No one speaks Latin as it is a dead language.
There is no Latin word for princess. The nearest is regis filia which is the daughter of the king.
Rex mei mundi.
There is no word for the noun "aviator" in latin, as aviation is a concept which did not yet exist when latin became a dead language