This is my oldest son: Sa se pitit gason pi gran mwen?

This is my oldest son.
Sa se pi gran pitit gason mwen.
Sa se pi gran gason mwen.
Sa se pi gran gason mwen an.
Sa se pi gran gason'm nan.

These are all the different ways you can say this.
Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words